Razorcar, sometimes a song loaded into the sequencer will affect your playing when you switch PM's, so check the sequencer to make sure it's clear. If not, clear the song and check to see that you're in normal mode. It may just be your data is corrupted and you need to redo the disk. I trust you made back-ups of all your disks and files, and if not, email me and we will take it from there.