Hi,
You know...I'm having the same problem with mine. My disk drive likes to stop reading my disks and pretends that there is nothing on them when in fact I know there are forty songs on there! I don't know what kind of problem you're having...but have you tried a disk drive cleaner? If your problem is similar to mine, have you tried sticking the disk into your computer and copying the songs onto a new disk? That works for me...but it's a pain. I also was asking around about replacing the disk drive. I didn't get an answer. I called Roland and a replacement one is over $100.00. Rip off...it probably is just a regular disk drive. Sorry I couldn't help you more.
-Tracey