JBK disc is not-readable

Hi,

I have a JBK MIDI-8380BM and am having problem with the player recently not able to read the included MIDI disc.  The player reads regular Karaoke DVD discs just fine, but always fails to read the MIDI disc (Vol.L5) and display the message No Disc each time I tried it.

I can Explore the disc with Windows just fine.  It shows volume name MDVD_6628, with a whole bunch of DKD files, and a MPG file.  I've tried to make duplicate copy of the disc onto a DVD+R/DL for suspecting the original disc may have been damage somehow.  But I still have the same problem.

Since there's nothing in the manual about troubleshooting this issue, and I have no idea on how to get a replacement disc (I bought the player on eBay a while back), I'm stuck.

Would you have any idea how I can get around this problem?  Any pointer on where I can buy a replacement disc will be greatly appreciated, since I don't want to shell out $400 for a new player (no one carries this model anymore, as JBK has come out with a new model, the M-3000).

Thanks ahead.

Jeff