Yes, it runs on Win7 here.
Sounds like you may be opening the device after opening the DAW software.

Hook up device
Let OS find it
Then open Recording software.

Also - if using ASIO drivers and you try to jump from one DAW software to another, sometimes it takes a few moments for the first software to release the driver. I'm pretty sure that error can be caused by this situation.

that's one possibility
Win7 32 bit or 64 bit?
Current drivers for the device? P-n-P doesn't mean it has current drivers.


I do not work here, but the benefits are still awesome
Make your sound your own!