I suggest uninstalling all ATI drivers/software from both the O/S and registry...then starting anew.
I wouldn't use beta drivers for the initial install...I'd go with what shipped with the card.
I would also reseat the physical card.
Then I would try the install anew.
I didn't see anything at the ATI website that was enlightening in their Support FAQ.
FWIW: When I uninstall ATI drivers gone awry, I first do the Add/Remove Programs ATI Uninstall Utility, everything else ATI that might be in Add/Remove. Then I search the registry (manually or using jv16 PowerTools) for all ATI entries and remove those. Then I use the XP Search function to find stray files...and delete those. Before I reboot, I go to Device Manager and make sure that the drivers are removed.
I reboot, then install from the CD once the desktop has settled.
I have experience with two AIWs (which are being brought back) which has yielded me this approach
Edited by hamluis, 17 July 2008 - 04:22 PM.