I'm a newby to Cakewalk. I have connected my Roland RD-88 to my computer, and set up my MIDI so Cakewalk accepts the input and output. I record, and can see the notes and velocities entered on the Cakewalk piano roll, but when I hit stop, pause, or spacebar the notes all disappear. Can you tell me where they might be hiding? Is there some setting I need to change?