Rhino 4.0 Evalutaion Version Rhino Vray Rendering Problem?

Rhino vray rendering problem? - rhino 4.0 evalutaion version

Well, I'm new to Rhino and Vray. Rhino 4.0 and a demo version of vray. I can not use materials that I made the Google SketchUp. For example, when choosing a wood floor of library materials when they change only the color of the soil layers of the objects their color to brown, I see no equipment.
Where am I wrong about this?
Thanks