Many things haven't been mentioned for instance, when did this start? Did you drop the note book? Did it work before? Did you corrupt or change your burning software? Has any malware issue cropped up that you're aware of? This info might help. Yes, a couple of these questions duplicate kimsland's efforts, sorry.
I have distinct opinions about TSST drives, in that I believe they're never actually able to read their own writing very well, at least not for very long, but this POV is obviously colored by my personal experiences with drives by TSST.
I coulda' accidentally stuck 2 DVDs in at once a couple of times, so there's enough blame to go around.