I am no expert however I have been fighting with my own HQCT for the last few days and have it working finally!!!
Windows doesn't find it like other hardware. The HQCT does need it's own power as well as the USB connected. It also has to have the Audio hooked up as well. I have mine hooked up to the "Line In" stereo jack.
Once you have it hooked up right, start up Centrafuse and go to Settings/Advanced Settings.
Then, go to Radio, select HQCT for Radio type.
Select "None" for "Record Input" I think it's called
Select CD AUX for "Audio out" I think it's called and leave everything else as is.
Basically, the USB has nothing to do with the Audio. The audio has to be hooked up through the audio output on the HQCT.
One thing. Make sure your CD Aux isn't muted in Windows.