Hey ya'll, anyone know what I can do about a problem with my Zoom B2. The right switch frequently doesn't work. It started as an occasional issue but now it acts up more often then not and always at the worst times. I just discovered I can use an external foot switch for the tuner/mute function, but still would like to be able to use that right switch for changing patches? It's 3 years old and I've really come to rely on it for gigs.