I bought a used '03 TL-S. Disk changer didn't work - dealer sent it out and it worked with pre-recorded cd when I picked it up but now it won't play home-made Cd's even though they play on all other units. I just keep getting error messages. I've tried burning licensed and unlicensed data - doesn't matter. Any suggestions (before I have to get it removed and send it back to the dealer)?