Can someone help me with Toast 6.0.7?

Hello and thanks in advance -

I cannot seem to burn a disk anymore on my iBook running Toast 6.0.7 and OSX 10.2.8. I always get this error message - (Roxio has been no help at all)

The drive reported an error:
Sense key = MEDIUM ERROR
Sense Code = 0x0c

This error occurs on all types of media and has turned my desk into a useless cd-r depository.

Any suggestions would be appreciated