quality media is an absolute MUST for working backups.
please, please, please take the time to browse the blank media forum and the bargain basement for media recommendations and where to get great media at great prices. there's a ton of info, but here are teh cliff notes: verbatim and taiyo yuden are the most recommended regardless of make/model of drive.
the above posters hit the nail on the head with anydvd/clonedvd2 from www.slysoft.com
also, be sure that your burner has the latest firmware as this can affect write strategies and burn quality as well.