I had the exact same problem with a my system (AMD 2800 CPU and an ATI
X850). I was never able to get it to work.

On Tue, 17 Oct 2006 14:11:02 -0700, BatteryOperated
wrote:

After installation of RC2, my X850XT is identified, but disabled due to
driver errors (from windows/microsoft supplied drivers). I've tried udating
the drivers to the BETA drivers from ATI for RC1, but that only leads to a
error message that pops up on the lower right that there are "incompatible
display adapters have been disabled" that never goes away. This is odd
because these drivers work fine on RC1. Anyone have suggestions or
experiencing similar problems?