What are your system specs, type/brand of media, latest firmware for the DVDRW? Have you cleaned up your PC? Defrag, run Ad-aware, run Spybot, turn off background services and startups, turn off any Blacklisted software for the DVD burning application. Example, most burning softwares will conflict with each other and conflict with In-CD packet-writing applications.
I use one of the buggiest DVD burning softwares ever made...321 Studios DVD XCopy Platinum. I have nearly 100% success by doing all these things I have mentioned. Also, you need to burn at the slowest possible speed. Speed kills. I own a Lite-On 851S.
Dell 8250, i850e 4xAGP 2.4ghzCPU 512mbPC1066RDRAM 120gb & 200gbATA
GeF4MX420 SBL5.1 SamSung48xCDRW LiteOn851SDVDRW
RJ-45 to Compaq 9660, 233mhzCPU 104mbFPRAM 12mbVoodoo2 Win95a