how many cd burning programs do you have on your computer and when was the last time you cleaned the lense of the cd burner.
Before you start burning again just do a simulation or test burn to see if that works after you have uninstalled the driver and reinstalled the driver.
If that doesn't work then uninstall all of your cd burner programs, then just install one of them. I had this problem when I had roxio easy cd creator and nero on the same computer. Over time the burns keep getting slower the buffer speed started to go down and then finally I had your problem or at the end of every burn could not finalize or burn error, etc.