W98SE with all updates. Ati Rage Pro 128 card.

When I go into display properties I cannot change the screen resolution / colour settings.

I get the following message. "The display control panel cannot modify the display properties." (This is translated from French so may not be exact).

I have de-installed / re-installed the Ati drivers, removed all traces from the registry, tried a different card, all updates including DirectX9.

No joy, still the same message. Anyone seen this before?

TIA,

emr