OK, I plugged it into the PC, and...
It works just fine. I am using the MS 360 controller drivers.

Green = Button 1
Red = Button 2
Yellow = Button 4
Blue = BUtton 3
Orange = Button 5
Solo Green = Buttons 1 & 9
Solo Red = Buttons 2 & 9
Solo Yellow = Buttons 4 & 9
Solo Blue = BUttons 3 & 9
Solo Orange = Buttons 5 & 9
Strum Bar = PoV Hat - Up & Down respectively
Whammy Bar = X Rotation
5 Way Switch = Z Axis
Start = Button 8
Back = Button 7
D-Pad = PoV Hat