UNITED STATES
                    SECURITIES AND EXCHANGE COMMISSION
                         WASHINGTON, D.C. 20549


                              SCHEDULE 13G


                UNDER THE SECURITIES EXCHANGE ACT OF 1934

                    (AMENDMENT NO.     1     )*
                                   ----------

                      Authorize.Net Holdings, Inc.
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                            (Name of Issuer)


                              Common Stock
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                     (Title of Class of Securities)

                                052686102
                           ------------------
                             (CUSIP Number)


                        AS OF DECEMBER 31, 2007

*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 5 pages


CUSIP No. 052686102                13G                       Page 2 of 5 pages
          ---------                                              ---  ---

--------------------------------------------------------------------------------
(1) NAMES OF REPORTING PERSONS.             Copper Rock Capital Partners, LLC
    I.R.S. IDENTIFICATION                   75-3179897
    NOS. OF ABOVE PERSONS
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(2) CHECK THE APPROPRIATE BOX IF A MEMBER   (a)    / /
    OF A GROUP (See Instructions)           (b)    / /
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(3) SEC USE ONLY
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(4) CITIZENSHIP OR PLACE OF ORGANIZATION    Delaware
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NUMBER OF SHARES             (5) SOLE VOTING POWER                            0
BENEFICIALLY
OWNED BY                    ---------------------------------------------------
EACH REPORTING               (6) SHARED VOTING POWER                          0
PERSON WITH:
                            ---------------------------------------------------
                             (7) SOLE DISPOSITIVE POWER                       0

                            ---------------------------------------------------
                             (8) SHARED DISPOSITIVE POWER                     0
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 (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON             0
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(10) CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
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(11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)                       0%
-------------------------------------------------------------------------------
(12) TYPE OF REPORTING PERSON (See Instructions)                             IA
-------------------------------------------------------------------------------


CUSIP No. 052686102                13G                       Page 3 of 5 pages
          ---------                                              ---  ---

ITEM 1.

    (a) NAME OF ISSUER: Authorize.Net Holdings, Inc.

    (b) ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:
        293 Boston Post Road West, Suite 220, Marlborough, MA 01752

ITEM 2.

    (a) NAME OF PERSON FILING: Copper Rock Capital Partners, LLC

    (b) ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE:
        200 Clarendon Street, 51st Floor, Boston, MA 02116

    (c) CITIZENSHIP: Delaware.

    (d) TITLE OF CLASS OF SECURITIES: Common Stock.

    (e) CUSIP NUMBER: 052686102

ITEM 3.  IF THIS STATEMENT IS FILED PURSUANT TO RULE 13d-1(b) OR 13d-2(b) OR
         (c), CHECK WHETHER THE PERSON FILING IS A:

    (a) / / Broker or dealer registered under section 15 of the Act

    (b) / / Bank as defined in section 3(a)(6) of the Act

    (c) / / Insurance company as defined in section 3(a)(19) of the Act

    (d) / / Investment company registered under section 8 of the Investment
            Company Act of 1940

    (e) /X/ An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E)

    (f) / / An employee benefit plan or endowment fund in accordance with
            Rule 13d-1(b)(1)(ii)(F)

    (g) / / A parent holding company or control person in accordance with
            Rule 13d-1(b)(1)(ii)(G)

    (h) / / A savings association as defined in section 3(b) of the Federal
            Deposit Insurance Act

    (i) / / A church plan that is excluded from the definition of an
            investment company under section 3(c)(14) of the Investment
            Company Act of 1940


CUSIP No. 052686102                13G                       Page 4 of 5 pages
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    (j) / / Group, in accordance with Rule 13d-1(b)(1)(ii)(J)

ITEM 4.  OWNERSHIP

(a) AMOUNT BENEFICIALLY OWNED: 0 shares.

    (b) PERCENT OF CLASS: 0%.

    (c) NUMBER OF SHARES AS TO WHICH SUCH PERSON HAS:

          (i) sole power to vote or to direct the vote: 0.

         (ii) shared power to vote or to direct the vote: 0.

        (iii) sole power to dispose or to direct the disposition of: 0.

         (iv) shared power to dispose or to direct the disposition of: 0.

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/.

ITEM 6.   OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON

          The right to receive or the power to direct the receipt of
          dividends from, or the proceeds from the sale of, the securities
          is held by certain clients of the reporting person, none of which
          has right or power with respect to more than five percent of the
          class of securities.

ITEM 7.   IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED
          THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY

          Not applicable.

ITEM 8.   IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP

          Not applicable.

ITEM 9.   NOTICE OF DISSOLUTION OF GROUP

          Not applicable.


CUSIP No. 052686102                13G                       Page 5 of 5 pages
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ITEM 10.   CERTIFICATION

           By signing below the undersigned certifies that, to the best of
           its knowledge and belief, the securities referred to above were
           acquired in the ordinary course of business and were not acquired
           and are not held for the purpose of or with the effect of changing
           or influencing the control of the issuer of the securities and
           were not acquired and are not held in connection with or as a
           participant in any transaction having that purpose or effect.

                                 SIGNATURE

           After reasonable inquiry and to the best of its knowledge and
belief, the undersigned certifies that the information set forth in this
statement is true, complete and correct.

FEBRUARY 7, 2008

                      COPPER ROCK CAPITAL PARTNERS, LLC



By: /s/ Michael A. Forrester
----------------------------
Michael A. Forrester
Chief Compliance Officer