Source : http://www.examnotes.net/archive95-2003-5-1010100.html
Deja-vue :
similar problem with my Win2003 Server.
I had a Radeon 9000 Pro installed and ran into all kinds of performance problems.
This fixed it for me:

start/run dxdiag

then, enable all Hardware acceleration.
also, enable Direct3D acceleration.
of course, you have DX9 installed?

best of luck!