MMJoystick not recognizing controller

Im trying to play rock band 2 with my wii guitar, which works normally on clone hero and other guitar hero games, but on RPCS3 under MMJoystick it shows the devices tap blanked out and my controller doesn't show up on any other handler. The adapter I'm using with the guitar has the latest drivers and is known to work on RPCS3 but mine just isn't showing up. I've tried using device manager to disable and enable the adapter, and other methods to try and make it show up but nothing has worked.