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Reading the Viewport

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I am getting strange results (very large numbers) when I try to read the viewport in the ResoreDeviceObjectMethod()? Anyone have any problems with reading the viewport under XP and 8.1?
	D3DVIEWPORT8 Viewport;
	cvIceSpriteVertices[0].y  = (float) Viewport.Height - 1;
	cvIceSpriteVertices[2].y  = (float) Viewport.Height - 1;
	cvIceSpriteVertices[2].x  = (float) Viewport.Width - 1;
	cvIceSpriteVertices[3].x  = (float) Viewport.Width - 1;

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With further debuging it seems that I am getting the following error when I call GetViewport:

Direct3D8: (INFO) :======================= Hal HWVP Pure device selected

Direct3D8: :DoneExclusiveMode
Direct3D8: (INFO) :HalDevice Driver Style 7

Direct3D8: (ERROR) :GetViewport does not work in pure-device

...Error: Get Viewport failed - Invalidcall

Does this mean that my driver is not supporting the call to GetViewport. If I switch to REF mode it seems to work. I am running Windows XP and a Radeon VIVO 64 Meg?


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