Hi,
The trouble shooting i would do would be to first re-install the drivers (allready done), then try the card in another pc (if available), then if you can shift your data that you want to keep off your PC i would try re-installing windows from scratch (i.e. format the disk drive and start again).
i know the last one is drastic but sometimes it is a lot faster to just start again (assuming it is a software issue).if a freash install doesn't work then it would be a hardware issue, but now you have a nice clean install to add a new card to so it all works out fine.
Also, try moving the card to a different PCI slot.. sometimes the slot can go bad.
I also wouldn't be putting SP2 on as a fix as it can kill some programs and drivers. i would wait a little while for driver updates and programs to compensate for SP2. SP2 does work on most PCs but i have read quite a few stories about SP2 woe.
