I have a Korg Kronos. I recorded a song upto half it's length using 10 tracks in the sequencer mode. I then saved it on a USB stick. When i switched off the system and restarted and reloaded the tracks in sequencer mode, my song played properly but when I tried to play (separately I.e. when my already recorded track finished playing) midi tracks 2,3,4 to record further, the tones wouldn't sound. All the other midi tracks sound except these three. Some help please?!