I dont have a footswitch but I bought a Midi Matrix, the Rhythm 1 channel wont disengage? I have my programs set up but even with Lead one selected the Rhythm wont change. I hooked up two grounding switches and can engage/disengage everything else through the midi jacks in the back but not Rhythm 1? Am I right in assuming that it should be able to turn off? Im confused as too what I should do next.