Deltek Advantage/Vista incompatibility

Our company uses Deltek "Timekeeper" and "Expensekeeper" Advantage 9.0 (Build 5) with SQL Server 2000 and WinXP and Win2000 workstations. We have been told that the new Vista OS will not work
with our Deltek software and that there is no timetable for release of a new version of Deltek that will work on Vista workstations. As a result IT is taking new computer workstations with Vista and wiping them clean and installing XP.
I would appreciate any information that anyone may have concerning this issue.
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