ned to rotate an assembly while Mates is selected

We recently had Windows 7 installed, and Solidworks 2010 was reinstalled. I now am having trouble with assembly mates. Previously, I could right click the mouse, either when building the assembly, or while Mates was selected, and I could select from the drop down list, to rotate the assembly. This option is no longer available and I am having trouble setting things up to make this available.

What am I missing?

regards,

Kennedy

SolidworksAssemblies