Exhibit 99.1

      (1) On April 22, 2004,  Insight  Capital  Partners III, L.P.  ("ICP III"),
      Insight Capital Partners III-Co-Investors,  L.P. ("ICP III CO) and Insight
      Capital Partners III (Cayman),  L.P. ("ICP III Cayman",  and together with
      ICP III and ICP III CO,  the  "Insight  Funds")  sold an  aggregate  5,000
      shares of the Issuer's  Common  Stock (the "Common  Stock") in open market
      transactions.

       (2) The amount listed  reflects the beneficial  ownership,  following the
      reported transactions, of the Issuer's securities owned by ICP III, all of
      which may be deemed  attributable to Insight Venture  Associates III, LLC,
      the  general  partner  of each of the  Insight  Funds (the  "Insight  GP),
      because the Insight GP is the sole general partner of ICP III.

      (3) The amount listed  reflects the  beneficial  ownership,  following the
      reported transactions, of the Issuer's Securities owned by ICP III CO, all
      of which may be deemed  attributable to the Insight GP because the Insight
      GP is the sole general partner of ICP III CO.

      (4) The amount listed  reflects the  beneficial  ownership,  following the
      reported transactions, of the Issuer's Securities owned by ICP III Cayman,
      all of which may be deemed  attributable to the Insight GP because Insight
      GP is the sole general partner of ICP III Cayman.

      (5) The amount listed  reflects the  beneficial  ownership,  following the
      reported  transactions,  of the Issuer's  Securities  owned by the Insight
      Funds,  all of which may be deemed  attributable to the Insight GP because
      the Insight GP is the sole general partner of each of the Insight Funds.

      (6) The amount listed  reflects the  beneficial  ownership,  following the
      reported  transactions,  of the Issuer's  Securities  owned by the Insight
      Funds and the  Insight GP, a portion of which is  attributable  to Jeffrey
      Horing  because  Jeffrey  Horing is a managing  member of the  Insight GP.
      Jeffrey Horing disclaims beneficial  ownership of such securities,  except
      to the extent of his pecuniary interest therein,  which may not be readily
      determinable.  The amount reported does not include 15,805 shares owned by
      Jeffrey Horing on an individual  basis and not  beneficially  owned by the
      Insight GP.

      (7) The amount listed  reflects the  beneficial  ownership,  following the
      reported  transactions,  of the Issuer's  Securities  owned by the Insight
      Funds and the  Insight  GP, a portion  of which is  attributable  to Jerry
      Murdock  because  Jerry  Murdock is a managing  member of the  Insight GP.
      Jerry Murdock disclaims beneficial ownership of such securities, except to
      the  extent  of  his   pecuniary   therein,   which  may  not  be  readily
      determinable.  The amount reported does not include 52,693 shares owned by
      Jerry Murdock on an  individual  basis and not  beneficially  owned by the
      Insight GP.

      (8) The amount listed includes the respective  proportionate percentage of
      7,250 shares of common  stock,  which were granted to Jerry Murdock in his
      former  capacity  as a Director  of the  Issuer.  Mr.  Murdock has made an
      effective  election  to defer the  actual  issuance  of such  shares.  Mr.
      Murdock has assigned all of his rights to these shares, and any additional
      shares granted to him in his capacity as a Director of the Issuer,  to the
      Insight Funds.