Desktop just started scrolling
 

I have an ATI Radeon 7000 card with a Cornerstone P1600 running Win XP Pro.

Until just now, I was displaying graphics fine at 1792x1344 at 32-bit. Tonight I booted up and my desktop scrolls like it's too big for the monitor. Now I can't use anything higher than 1600x1200. Help!

Edit: The only thing that has changed since the last time I rebooted the machine was I installed drivers for an Epson CX5000 scanner/printer and Ahead Nero 5. Those installed and worked perfectly at the higher resolution before I shut down the machine.