You have an unusual setup. My advice would be to roll back to the Catalysts...which you may need to do anyway as the Crimson interface is missing some huge features--like user resolution control (Crimson introduces a custom res creation utility for resolutions you can't actually use because of this.)
I really don't know why you'd want a virtual machine for gaming...what is it you are trying to isolate? But, if you were doing the same thing with the Catalysts then going back to them is the only way to fix the situation, it would appear.
Thanks for your answer. Well it works when I use the cleanup tool by amd and reinstalling.
I use this kind of system to not mix up my working environment with my gaming environment. Its actually working pretty well, considering gaming and virtual machines is something not really common. no frame loss etc. (well maybe, however not noticable for me ). apart from that its pretty easy to backup single machines.