EXHIBIT 99.1
                                                                   ------------



                          IDENTITY OF MEMBERS OF GROUP



        The  members  of the group  are GA, GA  GenPar,  GAP 78,  GAP  Bermuda,
GapStar,  GAP-W, KG, GmbH, GAPCO III and GAPCO IV (the "Reporting Persons"). GA
is the general  partner of GAP 78 and the sole member of GapStar.  GA GenPar is
the general partner of GAP Bermuda.  The Managing Directors of GA are Steven A.
Denning  (Chairman),  William  E. Ford  (President),  Peter L.  Bloom,  Mark F.
Dzialga,  Klaus Esser, Vince Feng,  William O. Grabe, Abhay Havaldar,  David C.
Hodgson,  Rene M. Kern,  Jonathan  Korngold,  Christopher G. Lanning,  Anton J.
Levy, Marc F. McMorris,  Thomas J. Murphy,  Matthew Nimetz,  Andrew C. Pearson,
David A. Rosenstein, Franchon M. Smithson, Tom C. Tinsley, Phillip P. Trahanas,
and Florian Wendelstadt  (collectively,  the "GA Managing  Directors").  The GA
Managing  Directors  are the  directors  and senior  executive  officers  of GA
GenPar. The GA Managing Directors are also the executive officers of GAP-W. The
Managing  Members  of GAPCO III and  GAPCO IV are GA  Managing  Directors.  The
general partner of KG is GmbH. Messrs.  Denning and Hodgson are shareholders of
GAPCO Management GmbH. By virtue of the fact that (i) the GA Managing Directors
are the  directors  and senior  executive  officers of GA GenPar and the senior
executive  officers of GAP-W,  (ii) GA is the general partner of GAP 78 and the
sole member of GapStar,  (iii) GA GenPar is the general partner of GAP Bermuda,
(iv) the Managing  Members of GAPCO III and GAPCO IV are GA Managing  Directors
and (v) the GA Managing  Directors  are  authorized  and  empowered to vote and
dispose of the  securities  held by KG and GmbH,  the Reporting  Persons may be
deemed to be a "group"  within  the  meaning  of Rule  13d-5 of the  Securities
Exchange Act of 1934, as amended.