I'll bet others would echo these suggestions:
Your flash might be bad. Reflash to G7P9 and retry (search here for flash suggestions like flashing in safe mode). You might prefer B7P9, but for the moment I can't agree that there are any strong reasons, and many of us have as good or better results with "P9" as "T9" - check the "T9" thread for comparisons.
If flashing the drive has no effect, pick up a small pack of different media. This crosschecks the media as the potential problem. I've read several posts that find fingerprints on Fuji TY, indicating the media isn't handled carefully at Fuji. I'd therefore suggest you try something other than Fuji, but make it a cheap, small purchase.
Beyond that, check for system issues like the IDE cable, the position (master of the secondary seems best), and perhaps even drivers on the IDE controller. To that end, you'll need to inform us just what machine you have, and what drivers appear for your IDE controller.
If the problem isn't scrubbed away after these steps (which ought to be performed one at a time so as to identify which made a difference), consider the mastering software itself. There are other free apps that can write. Perhaps an uninstall and reinstall of the burning app you use is in order (more than a few found this to be of some help). Have you anything from VSO? From them one might accidentally acquire the "Patton Coffin" (sp?) driver, which is known to cause problems. It should be removed if you have it.
If, after these steps, you still find your drive isn't burning discs, you may have an RMA in your future.
Best of luck.
Oh, I'm not among those with any of these problems. My OEM (NU DDW163) has been a dream peripheral.