[Hackrf-dev] HackRF installed under WIn7 but "busy"for SDR#.

[sdfg sdfhsdfh]

Hi guys,
just received HackRF and tested under Windows 7. I managed to install drivers but when I configure SDR# and hit play/start I receive "1 copatible device have been found but are all busy" (screeenshot: http://i.imgur.com/jc30J0T.png).
I used the latesd SDR# with latest included zadig.exe.
Any hint ? 		 	   		  
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