maybe try installing the drivers? i assume you have the drivers for the card to start with. and did you do a clean install from the XP cd or a factory restore operation?
I have some trouble with my video card. I just reinstsalled windows xp on my computer because there was a bug, and everything was going great except for the problem that it says i have no video card. Before i reinstalled xp my video card was working fine, but know when i try and open a gamming file it says that i don't have a video card. Someone please help