Yea if you don't remove then reinstall the drivers for the graphic cards, it just won't work. Would you use a graphic card without installing it's drivers ?? I guess not ^^ These mistakes just happen so don't worry. Reinstall driver, reboot, activate crossfireX, configure the thing, reboot and voilà! ^^
I tried that. Still isn't working.
I have 8 gb of RAM on top of my video card set up. I'm running a 32-bit OS though, do you think that might be the problem?