Is there a way to reset the wk1800 to the origianl factory settings? I have been having a hard time with the song memory function and now the drums no longer sound when I attempt to record with percusssion. It worked for a while, but now it doesn't work. After attempting to record with percussion when I return to just playing keyboard with a drums the drums wont come through the speakers until I punch in one of the Registration set ups that have drums with them. Freaky!?!?