First off, let's start with changing your target setting from DVD9 to DVD5. You're burning to a SL disc, not a DL disc.
What is your burn speed setting in fab?...slowest, recommended or fastest?
If you don't mind trialing another disc...set your burn speed to slowest and give it another shot.
The error you received can be caused by a number of things...from a loose cable to a failing burner or system error, but let's try this first and keep our fingers crossed. Also, it'll help if you could post screen shots of cd-speed tests.
Good luck...
Catch you later...I gotta hit the sack.