I wish I knew, but I don't. You need to isolate the problem, which just guessing, is the keyboard and not Reason. You need to borrow a keyboard and test this theory with a new keyboard. If you still have the problem, then I would reinstall Reason. If you don't have the problem, then you need to contact Yamaha, or dig into the web for answers. I wish that I could be of more help. Maybe SG, Titan or some of the other regulars might know.

Joe