Shoutbox

Mind giving some specs on your computer, I've heard of many problems with NVIDIA AGP cards working on lower spec systems, similar to this. The best thing to do is download a BIOS update from your computer's manufacturer's website (or motherboards). From what I've seen before if that doesn't fix it then you're screwed.
Try taking the card out and putting it in another slot (if available) that should buy you around a week or so. The problems usually caused with the graphics card being literally in physical size not totally fitting and connections breaking down.
Also, if possible, I'd consider taking it back and getting a VGA card, NVIDIA's VGA cards cause fewer conflicts in general than the AGP ones on a larger scale...