Basically there are four reasons for a burn error.
1. sub-standard media - Always use a known-to-be good branded media
2. debry-laden optical drive - periodically clean the lense with a lense-cleaner CD.
3. speed burning - do not burn at the maximum speed. Always lower the burn speed, the lower the better.
4. Multitasking - Although theoretcally with power-horses on your hand multitasking is less troublesome, when it comes to burning prefer to do a single job that is burning and leave it alone doing that one task.