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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                  ------------

                                  SCHEDULE 13G
                                  Amendment 1

           INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO
              RULES 13d-1 (b), (c) AND (d) AND AMENDMENTS THERETO
                           FILED PURSUANT TO 13d-2 (b)

                              Open Solutions, Inc.
--------------------------------------------------------------------------------
                                (Name of Issuer)

                                  Common Stock
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                   68371P 10 2
--------------------------------------------------------------------------------
                                 (CUSIP Number)

                                December 31, 2003
--------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

      |_|   Rule 13d-1(b)

      |_|   Rule 13d-1(c)

      |X|   Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).

                               Page 1 of 17 pages


CUSIP No. 68371P 10 2                                         Page 2 of 17 Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

      Menlo Ventures VI, L.P.
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |_|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      Delaware
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        -0-
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            -0-
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               -0-
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        -0-
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      -0-
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |-|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      0%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      PN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!



CUSIP No. 68371P 10 2                                         Page 3 of 17 Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

      Menlo Entrepreneurs Fund VI, L.P.
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |_|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      Delaware
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        -0-
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            -0-
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               -0-
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        -0-
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      -0-
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |-|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      0%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      PN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!



CUSIP No. 68371P 10 2                                         Page 4 of 17 Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

      MV Management VI, L.P.
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |_|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      Delaware
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        -0-
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            -0-
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               -0-
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        -0-
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      -0-
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |-|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      0%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      PN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!




CUSIP No. 68371P 10 2                                         Page 5 of 17 Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

      H. DuBose Montgomery
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |_|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      United States
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        11,958
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            -0-
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               11,958
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        -0-
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      11,958
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |-|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      .065%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      IN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!



CUSIP No. 68371P 10 2                                         Page 6 of 17 Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

      Thomas H. Bredt
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |_|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      United States
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        11,958
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            -0-
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               11,958
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        -0-
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      11,958
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |-|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      .065%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      IN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!



CUSIP No. 68371P 10 2                                         Page 7 of 17 Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

      Douglas C. Carlisle
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |_|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      United States
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        11,958
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            -0-
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               11,958
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        -0-
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      11,958
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |-|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      .065%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      IN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!



CUSIP No. 68371P 10 2                                         Page 8 of 17 Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

      John W. Jarve
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |_|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      United States
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        11,958
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            -0-
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               11,958
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        -0-
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      11,958
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |-|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      .065%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      IN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!



CUSIP No. 68371P 10 2                                         Page 9 of 17 Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

      Sonja L. Hoel
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |_|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      United States
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        556
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            -0-
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               556
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        -0-
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      556
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |-|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      .003%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      IN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!



CUSIP No. 68371P 10 2                                        Page 10 of 17 Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

      Mark A. Siegel
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |_|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      United States
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        -0-
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            -0-
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               -0-
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        -0-
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      -0-
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |-|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      0%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      IN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!


                          INSTRUCTIONS FOR SCHEDULE 13G

Instructions for Cover Page

         (1)      Names and I.R.S. Identification Numbers of Reporting
                  Persons--Furnish the full legal name of each person for whom
                  the report is filed--i.e., each person required to sign the
                  schedule itself--including each member of a group. Do not
                  include the name of a person required to be identified in the
                  report but who is not a reporting person. Reporting persons
                  that are entities are also requested to furnish their I.R.S.
                  identification numbers, although disclosure of such numbers is
                  voluntary, not mandatory (see "SPECIAL INSTRUCTIONS FOR
                  COMPLYING WITH SCHEDULE 13G" below).

         (2)      If any of the shares beneficially owned by a reporting person
                  are held as a member of a group and that membership is
                  expressly affirmed, please check row 2(a). If the reporting
                  person disclaims membership in a group or describes a
                  relationship with other persons but does not affirm the
                  existence of a group, please check row 2(b) [unless it is a
                  joint filing pursuant to Rule 13d1(k)(1) in which case it may
                  not be necessary to check row 2(b)].

         (3)      The third row is for SEC internal use; please leave blank.

         (4)      Citizenship or Place of Organization - Furnish citizenship if
                  the named reporting person is a natural person. Otherwise,
                  furnish place of organization.

      (5) - (9), Aggregate Amount Beneficially Owned By Each Reporting (11)
         Person, Etc.--Rows (5) through (9) inclusive, and (11) are to
                  be completed in accordance with the provisions of Item 4 of
                  Schedule 13G. All percentages are to be rounded off to the
                  nearest tenth (one place after decimal point).

         (10)     Check if the aggregate amount reported as beneficially owned
                  in row (9) does not include shares as to which beneficial
                  ownership is disclaimed pursuant to Rule 13d-4 (17 CFR
                  240.13d-4] under the Securities Exchange Act of 1934.

         (12)     Type of Reporting Person--Please classify each "reporting
                  person" according to the following breakdown (see Item 3 of
                  Schedule 13G) and place the appropriate symbol on the form:

                  Category                                   Symbol
                  Broker Dealer                                BD
                  Bank                                         BK
                  Insurance Company                            IC
                  Investment Company                           IV
                  Investment Adviser                           IA
                  Employee Benefit Plan, Pension Fund,
                    or Endowment Fund                          EP
                  Parent Holding Company/Control Person        HC
                  Savings Association                          SA
                  Church Plan                                  CP
                  Corporation                                  CO
                  Partnership                                  PN
                  Individual                                   IN
                  Other                                        OO

                               Page 11 of 17 pages




         Notes:   Attach as many  copies of the second part of the cover page as
                  are needed, one reporting person per page.

                  Filing persons may, in order to avoid unnecessary duplication,
                  answer items on the schedules (Schedule 13D, 13G or 14D1) by
                  appropriate cross references to an item or items on the cover
                  page(s). This approach may only be used where the cover page
                  item or items provide all the disclosure required by the
                  schedule item. Moreover, such a use of a cover page item will
                  result in the item becoming a part of the schedule and
                  accordingly being considered as "filed" for purposes of
                  Section 18 of the Securities Exchange Act or otherwise subject
                  to the liabilities of that section of the Act.

                  Reporting persons may comply with their cover page filing
                  requirements by filing either completed copies of the blank
                  forms available from the Commission, printed or typed
                  facsimiles, or computer printed facsimiles, provided the
                  documents filed have identical formats to the forms prescribed
                  in the Commission's regulations and meet existing Securities
                  Exchange Act rules as to such matters as clarity and size
                  (Securities Exchange Act Rule 12b-12).


              SPECIAL INSTRUCTIONS FOR COMPLYING WITH SCHEDULE 13G

Under Sections 13(d), 13(g), and 23 of the Securities Exchange Act of 1934 and
the rules and regulations thereunder, the Commission is authorized to solicit
the information required to be supplied by this schedule by certain security
holders of certain issuers.

Disclosure of the information specified in this schedule is mandatory, except
for I.R.S. identification numbers, disclosure of which is voluntary. The
information will be used for the primary purpose of determining and disclosing
the holdings of certain beneficial owners of certain equity securities. This
statement will be made a matter of public record. Therefore, any information
given will be available for inspection by any member of the public.

Because of the public nature of the information, the Commission can use it for a
variety of purposes, including referral to other governmental authorities or
securities self-regulatory organizations for investigatory purposes or in
connection with litigation involving the Federal securities laws or other civil,
criminal or regulatory statutes or provisions. I.R.S. identification numbers, if
furnished, will assist the Commission in identifying security holders and,
therefore, in promptly processing statements of beneficial ownership of
securities.

Failure to disclose the information requested by this schedule, except for
I.R.S. identification numbers, may result in civil or criminal action against
the persons involved for violation of the Federal securities laws and rules
promulgated thereunder.


                              GENERAL INSTRUCTIONS

A.       Statements  filed pursuant to Rule 13d-1(b)  containing the information
         required  by this  schedule  shall be filed not later than  February 14
         following the calendar year covered by the statement or within the time
         specified in Rules  13d-1(b)(2) and 13d2(c).  Statements filed pursuant
         to Rule  13d-1(c)  shall be filed  within the time  specified  in Rules
         13d-1(c),  13d-2(b) and  13d-2(d).  Statements  filed  pursuant to Rule
         13d-1(d)  shall be filed not  later  than  February  14  following  the
         calendar year covered by the statement  pursuant to Rules  13d-1(d) and
         13d-2(b).

B.       Information contained in a form which is required to be filed by rules
         under section 13(f) (15 U.S.C. 78m(f)) for the same calendar year as
         that covered by a statement on this schedule may be incorporated by
         reference in response to any of the items of this schedule. If such
         information is

                               Page 12 of 17 pages



         incorporated by reference in this schedule, copies of the relevant
         pages of such form shall be filed as an exhibit to this schedule.

C.       The item numbers and captions of the items shall be included but the
         text of the items is to be omitted. The answers to the items shall be
         so prepared as to indicate clearly the coverage of the items without
         referring to the text of the items. Answer every item. If an item is
         inapplicable or the answer is in the negative, so state.

Item 1.

         (a) Name of Issuer: Open Solutions, Inc.

         (b) Address of Issuer's Principal Executive Offices:

                    300 Winding Brook Drive
                    Glastonbury, CT 06033

Item 2.

         (a) Name of Person Filing:

                    Menlo Ventures VI, L.P. ("MV VI") Menlo Entrepreneurs Fund
                    VI, L.P. ("MEF VI") MV Management VI, L.P. ("MVM VI") H.
                    DuBose Montgomery ("HDM") Thomas H. Bredt ("THB") Douglas C.
                    Carlisle ("DCC") John W. Jarve ("JWJ") Sonja L. Hoel ("SLH")
                    Mark A. Siegel ("MAS")

         (b) Address of Principal Business Office or, if none, Residence

                    3000 Sand Hill Road
                    Building 4, Suite 100
                    Menlo Park, CA 94025

         (c)      Citizenship:

                   Entities:     MV VI    -        Delaware
                                 MEF VI   -        Delaware
                                 MVM VI   -        Delaware

                   Individuals:  HDM      -        United States
                                 THB      -        United States
                                 DCC      -        United States
                                 JWJ      -        United States
                                 SLH      -        United States
                                 MAS      -        United States

         (d)      Title of Class of Securities: Common Stock

         (e) CUSIP Number: 68371P 10 2

                               Page 13 of 17 pages



Item     3. If this statement is filed pursuant to ss.ss.240.13d-1(b), or
         240.13d-2(b) or (c), check whether the person filing is a:

                  Not applicable

Item 4.  Ownership

Provide the following information regarding the aggregate number and percentage
of the class of securities of the issuer identified in Item 1.



------- ------------ ----------- ---------- ------------ ----------- ------------ ------------ ----------- ----------- -----------
                       MV VI      MEF VI      MVM VI        HDM          THB          DCC         JWJ         SLH         MAS
------- ------------ ----------- ---------- ------------ ----------- ------------ ------------ ----------- ----------- -----------
                                                                                            
(a)     Beneficial      -0-         -0-         -0-        11,958       11,958        11,958     11,958       556         -0-
        Ownership
------- ------------ ----------- ---------- ------------ ----------- ------------ ------------ ----------- ----------- -----------
(b)     Percentage      -0-         -0-         -0-         .065%       .065%        .065%        .065%      .003%        -0-
        of Class
------- ------------ ----------- ---------- ------------ ----------- ------------ ------------ ----------- ----------- -----------
(c)     Sole            -0-         -0-         -0-        11,958       11,958        11,958     11,958       556         -0-
        Voting
        Power
------- ------------ ----------- ---------- ------------ ----------- ------------ ------------ ----------- ----------- -----------
        Shared          -0-         -0-         -0-         -0-          -0-          -0-         -0-         -0-         -0-
        Voting
        Power
------- ------------ ----------- ---------- ------------ ----------- ------------ ------------ ----------- ----------- -----------
        Sole            -0-         -0-         -0-        11,958       11,958        11,958     11,958       556         -0-
        Dispositive
        Power
------- ------------ ----------- ---------- ------------ ----------- ------------ ------------ ----------- ----------- -----------
        Shared          -0-         -0-         -0-         -0-          -0-          -0-         -0-         -0-         -0-
        Dispositive
        Power
------- ------------ ----------- ---------- ------------ ----------- ------------ ------------ ----------- ----------- -----------



Instruction:  For computations  regarding  securities which represent a right to
acquire an underlying security see ss.240.13d-3(d)(1).

Item 5.  Ownership of Five Percent or Less of a Class

If this statement is being filed to report the fact that as of the date hereof
the reporting person has ceased to be the beneficial owner of more than five
percent of the class of securities, check the following [x] Instruction:
Dissolution of a group requires a response to this item.

Item 6. Ownership of More than Five Percent on Behalf of Another Person

If any other person is known to have the right to receive or the power to direct
the receipt of dividends from, or the proceeds from the sale of, such
securities, a statement to that effect should be included in response to this
item and, if such interest relates to more than five percent of the class, such
person should be identified. A listing of the shareholders of an investment
company registered under the Investment Company Act of 1940 or the beneficiaries
of employee benefit plan, pension fund or endowment fund is not required.

         Not applicable

                               Page 14 of 17 pages


Item     7. Identification and Classification of the Subsidiary Which Acquired
         the Security Being Reported on By the Parent Holding Company or Control
         Person.

If a parent holding company or Control person has filed this schedule, pursuant
to Rule 13d-1(b)(1)(ii)(G), so indicate under Item 3(g) and attach an exhibit
stating the identity and the Item 3 classification of the relevant subsidiary.
If a parent holding company or control person has filed this schedule pursuant
to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification
of the relevant subsidiary.

         Not applicable

Item 8. Identification and Classification of Members of the Group

If a group has filed this schedule pursuant to ss.240.13d-1(b)(1)(ii)(J), so
indicate under Item 3(j) and attach an exhibit stating the identity and Item 3
classification of each member of the group. If a group has filed this schedule
pursuant to ss.240.13d-1(c) or ss.240.13d-1(d), attach an exhibit stating the
identity of each member of the group.

         No   reporting   person  is  a  member  of  a  group  as   defined   in
         Sectionss.240.13d-1(b)(1)(ii)(J)

Item 9. Notice of Dissolution of a Group

Notice of dissolution of a group may be furnished as an exhibit stating the date
of the dissolution and that all further filings with respect to transactions in
the security reported on will be filed, if required, by members of the group, in
their individual capacity. See Item 5.

         Not applicable



                   Remainder of page intentionally left blank



                               Page 15 of 17 pages



Item 10. Certification

After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.


Date: June 24, 2004

MENLO VENTURES VI, L.P.                       MENLO ENTREPRENEURS FUND VI, L.P.

By: MV Management VI, L.L.C.                  By: MV Management VI, L.L.C.
    its general partner                           its general partner


    By: /s/ Douglas C. Carlisle                   By: /s/ Douglas C. Carlisle
        ---------------------------                   --------------------------
            General Partner                               General Partner



MV MANAGEMENT VI, L.P.


By: /s/ Douglas C. Carlisle
    ------------------------------
          General Partner


    /s/ H. DuBose Montgomery                      /s/ John W. Jarve
----------------------------------            ----------------------------------
        H. DuBose Montgomery John W. Jarve


    /s/ Thomas H. Bredt                           /s/ Douglas C. Carlisle
----------------------------------            ----------------------------------
        Thomas H. Bredt                               Douglas C. Carlisle


    /s/ Sonja L. Hoel                             /s/ Mark A. Siegel
----------------------------------            ----------------------------------
        Sonja L. Hoel                                 Mark A. Siegel


EXHIBITS

A: Joint Filing Statement


                                    EXHIBIT A

                            AGREEMENT OF JOINT FILING

         We, the undersigned, hereby express our agreement that the attached
Schedule 13G is filed on behalf of us.

Date: June 24, 2004

                               Page 16 of 17 pages


MENLO VENTURES VI, L.P.                       MENLO ENTREPRENEURS FUND VI, L.P.

By: MV Management VI, L.L.C.                  By: MV Management VI, L.L.C.
    its general partner                           its general partner


    By: /s/ Douglas C. Carlisle                   By: /s/ Douglas C. Carlisle
        ---------------------------                   --------------------------
            General Partner                               General Partner



MV MANAGEMENT VI, L.P.


By: /s/ Douglas C. Carlisle
    ------------------------------
          General Partner


    /s/ H. DuBose Montgomery                      /s/ John W. Jarve
----------------------------------            ----------------------------------
        H. DuBose Montgomery John W. Jarve


    /s/ Thomas H. Bredt                           /s/ Douglas C. Carlisle
----------------------------------            ----------------------------------
        Thomas H. Bredt                               Douglas C. Carlisle


    /s/ Sonja L. Hoel                             /s/ Mark A. Siegel
----------------------------------            ----------------------------------
        Sonja L. Hoel                                 Mark A. Siegel

                               Page 17 of 17 pages