Calling All Tech-Heads

I'm having trouble with my video card again.

My old card died and I bought a new one. I had few choices, seeing as how I'm running an AGP machine. I ended up with a Radeon HD 2600, but am having a few problems that I hope someone can help me with.

Initially, it worked fine most of the time, but would occasionally fail when I tried to run anything that changed resolutions (ie, games). The monitors (I dual monitor) would go black and then lose connection. They would start trying to restablish their connection with the video card and a window would pop up, showing them cycling between Analog and Digital.

So, in my infinite wisdom, I decided to try and wipe the drivers and reseat the card (just to ensure it wasn't something physical). I reseated and replugged in the power on the card and then went about reinstalling drivers. I initially reinstalled the original drivers and then updated to the latest Radeon drivers (8.2, I believe).

I did this all on one monitor, thinking it would be easier that way and kept my second monitor unplugged. Once finished, I reattached my second monitor and now it won't 'recognize it.' Both monitors boot normally and I get the Bios info on both. The Windows XP screen comes up normally with the loading bar on both screens. Then, the second monitor loses connection and tries to restablish it, cycling between Analog and Digital. This wouldn't be so bad, but the original problem of switching resolution still remains. I've tried using both Windows properties and the Catalyst Control Center with the same results (both recognize the 2nd monitor, but I lose connection when I activate it).

So, I'm down to one monitor and still can't play anything. Does anybody have any ideas? The video card box recommends a 300-watt power supply and I've got a 330. I've got the latest Direct X (9.0c). I've tried switching the two monitors (so 1 is 2 and vice-versa) with the same result. In an ideal world, I would have both monitors and be able to game. I've tried lowering the resolution and a few other tricks, but to no avail.

Weirdly enough, WoW runs fine.

So, if anyone has any ideas, let me know.

Cheers,
-Jason