Sounds like you have some corrupt midi files. Run them through Michael Bedesem's MIDI Player program, resave them and it shoud solve your problem.

Also, do a minor system restoration by holding down the rightmost white key while powering up the keyboard - just to be on the safe side.

Gary cool
PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!