Hello, the track sounds disappear after a few minutes. I proceed as follows: I select a bank between A and H, I click on BROWSER to select the instrument of my choice, then REC. I'm recording a MIDI track, but after 5 minutes, when I press PLAY, there is no sound. I have to click BROWSER again, and LOAD on the instrument I used to record, and then the sound comes back. I have this problem on all tracks. Thanks for your help.