UR 44 driver could not be selected...

So I just installed the driver, the dspMixFX UR44 and Cubase 7AI. If I select de UR 44 audio driver (that’s the “Yamaha Steinberg USB Audio”), it says: “Driver could not be opened”…It works fine with Studio One 2, but not with Cubase…

And, when I open Cubase, that box appears, where I can select the audio driver, and when I select the UR 44, I get the message: “Driver could not be selected”.

Please help!
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