Those Taiyo Yuden discs are cheap, but not great quality. I used them in the past but had issues, so I changed to a more expensive but less troublesome disc. What burning software do you use??? Nero has a toolkit in its software package that can be helpful to analyze the disc. What about firmware updates for your burner??? Sorry, thats all I can think of, but I'm brain dead at the moment, coffee may help....
Heres a link to some firmware, make positive you select the correct one.
http://www2.panasonic.com/webapp/wcs...ge=DVDFirmware
This is a stand alone recorder, so the firmware is all I can think of. Do you have a DVD player on your PC?? If so you can check download.com for a disc analyzer.