Is the x86 vWorkspace 7.5 license also useable for the x64?

I just received vWorkspace from our customer containing a x86 install cd and printed license. Al the servers the have a W2k8R2 servers so th x86 installer does not run.

Is the license included with the CD (printer on it) for both versions or do i need a differend key for the x64 installation?

Thanks in advance guys!