I am not sure about this drive, but I would say to try Upgrading the firmware for it, from
http://www.plextor.com/english/suppo...firm_1210.html
What version of the software are you using? Also, the Microstudio demo does not use the new MMC software, which this drive may not support to read the Karaoke.
It is possible that this drive may be to old to work with our newer technology.