Xbox RB4 Strat w/ Xbox Wireless Adapter - Not recognized a Device

Sorry if this has been discussed before, but I cannot find the answer. I have an Xbox RB4 Strat and a Xbox wireless adapter. The guitar is connected via the adapter (I can navigate menus with the guitar on my PC), but when I boot up YARG, it is not recognized when I try to create a profile. The only things listed are "Mouse", Keyboard" and "Microphone". What am I missing here? Any help is appreciated.