Cross + U46MKII not working -> Windows7 64Bit

I always get an error when trying to load a track into a deck:
Track can't be loaded - Please Check your Audio Settings.
Under Win7 32 Bit it works fine.
I used the MV drivers. System was reinstalled. Error is the same

Track can't be loaded - Please Check your Audio Settings.
Under Win7 32 Bit it works fine.
I used the MV drivers. System was reinstalled. Error is the same
