Combo Drive Won't Recognize Blank Cd-rs


Have you heard of an issue with the combo drives not regognizing blank CD-Rs?

I have a 700 mhz eMac. I'm at an advanced technical level. I am using CDs from the same 100 pack that were working before. I even tried another brand as well as restarting my machine with a disk in the drive. It says that the disk is unreadable. I can take the same disk and burn it on another machine (mac and windows). The drive reads regular CDs and DVDs just fine. I checked my CD/DVD preferences and it says it will ask what to do if I insert a blank CD.