I cannot rotate (Tilt / Spin / Roll) in AutoCAD
You must be in a 3D “Visual Style” in AutoCAD to rotate your model. Rotation is not possible in a 2D “Visual Style”.
The command e.g. in AutoCAD Mechanical 2008 would be:
vscurrent 3dwireframe
You can also change the Visual Style by selecting “View->Visual Styles->Wireframe“.