AMENDMENT ONE TO WARRANT TO PURCHASE 60,651 SHARES OF COMMON STOCK OF ONESOFT CORPORATION This AMENDMENT ONE TO WARRANT TO PURCHASE 60,651 SHARES OF COMMON STOCK OF ONESOFT CORPORATION (the "Amendment") is made this 28th day of February, 2000 by and...

                                                                  Exhibit 4.3(a)

                                 AMENDMENT ONE
                                      TO
               WARRANT TO PURCHASE 60,651 SHARES OF COMMON STOCK
                                      OF
                              ONESOFT CORPORATION


     This AMENDMENT ONE TO WARRANT TO PURCHASE 60,651 SHARES OF COMMON STOCK OF
ONESOFT CORPORATION (the "Amendment") is made this 28th day of February, 2000 by
and between OneSoft Corporation (the "Company") and Deutsche Bank Securities,
Inc. (the "Holder").

WHEREAS, the Holder is the holder of that certain Warrant to Purchase 60,651
Shares of Common Stock of OneSoft Corporation (the "Warrant"); and

WHEREAS, the Holder and the Company desire to amend the Warrant to conform to
their agreement as set forth in a letter from the Holder to the Company dated
April 27, 1999.

NOW THEREFORE, the Holder and the Company hereby agree as follows:

1.  The first sentence of the preamble to the Warrant is hereby amended to read
    in its entirety as follows: "This is to certify that, FOR VALUE RECEIVED,
    DEUTSCHE BANK SECURITIES, INC. or its registered assigns pursuant to Section
    (d) hereof ("Holder"), is entitled as of April 27, 1999 to purchase, subject
    to the provisions of this Warrant, from OneSoft Corporation, a Delaware
    corporation (the "Company"), Sixty Thousand Six Hundred Fifty -One (60,651)
    fully paid validly issued and nonassessable shares of Common Stock, par
    value $.001 per share of the Company ("Common Stock"), at the exercise price
    of $6.59 per share until April 27, 2004."

2.  Section (f) of the Warrant is hereby amended to read in its entirety as
    follows: "(f) [reserved]."

3.  The last sentence of Section (i) of the Warrant is hereby deleted.

4.  Section (l)(3) of the Warrant is hereby amended to read in its entirety as
    follows: "(3) Determination of Fair Market Value. For purposes of this
                  ----------------------------------
    Section (l), fair market value of a share of Common Stock as of a particular
    date (the "Determination Date") shall be determined in accordance with
    Section (c) of this Warrant."


IN WITNESS WHEREOF, the Holder and the Company have  caused this Amendment to be
executed by their respective officers thereunto duly authorized.

DEUTSCHE BANK SECURITIES, INC.


By: /s/ Xxxxxxx X. Xxxxxx
    ---------------------
Name: Xxxxxxx X. Xxxxxx
      -------------------
Title: Managing Director
       ------------------

ONESOFT CORPORATION


By: /s/ Xxxxxxxxx X. Xxxxxxx, III
    -----------------------------
Name: Xxxxxxxxx X. Xxxxxxx, III
      ---------------------------
Title: CFO
       --------------------------