Graphic Issues with Navisworks

[eurobass]

Just upgraded to Windows x64 and installed a 30day trial of Navisworks 2010. I never had this issue before, but I'm getting weird graphic issues in my model window. It's seeing a still frame through to a "frozen desktop" (attached image). The Image flickers between my model and the "frozen desktop" when navigation throughout my model.I'm using two NVIDIA GeForce 8800 GT cards, on two monitors. Anyone have any setting suggestions?

thanks!

Daniel

[david.kingham]

Did you install the latest video card driver?

[eurobass]

Yes I did. Upgraded directly from Nvidia's website.