My symptoms were different so I think my advice won't help.
My system permitted the install just fine. Try the oldest version of the
driver you can find. The problem for me because that I could not get the
ATI drivers to see that there was any monitor attached to the computer, and
it was disabling the Device tab definition. I could not therefore go
beyond 1600x1200. To get beyond 1600x1200:
In the full ATI install with ATI Control Panel, there is an extra tab named
"Displays". The settings that you specify there for the monitor are
*independent* of the Display Properties settings that are set by any of:
Display Properties | Settings tab
Display Properties | Advanced | Adapter
Powerstrip
ATI Tray Tools
The resolution on the Displays tab acts as a kind of filter on the Display
Properties resolution. If the Displays tab is set to 1600x1200 and the
Display Properties says 2048x1536, what you end up with is a 2048 x 1536
virtual desktop mapped into a 1600x1200 physical desktop. I don't
understand why they chose to involve the user of a high resolution monitor
into that kind of complexity as a default condition, but they do.
The *default* resolution on the Displays tab is 1600x1200. So when you
exceed this default resolution, you get the virtual mapping effect I
described. It's easy on most of our ATI RADEON installations to just use
Displays to set the maximum resolution as high or higher than you want to go
on Display Properties. Under Windows 2003, the Displays tab has its
Monitor button *greyed out*. So you cannot change the default resolution.
Now, to the good news. If you go to Display Properties | Advanced |
Adapter tab | List All Modes button to explicitly set the resolution, it
invokes a side-effect that will help fix the problem. As a side effect of
setting the
resolution this way, now all of a sudden the Displays tab shows the monitor
button enabled! You are then able to reset the Displays resolution to
higher than the Display Properties, and now everything works fine.