Also try using a different type of media, if the one you have is a DVD-R then try a DVD+R, it may work, like brian says it's a bit hit an miss.

Follow Richards advice and make an image (with imgburn, it's free) and then burn a new one on a quailiy DVD at a slow speed. I burn my tdk's at x4 speed (the slowest rated for the disc) and my Verbatim DVD-RW's at x2 speed and have no problems.

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Sept 03, M3, Silver Grey. Retro-fits: Modded Mk4 DVD Drive, OEM Bluetooth, VR Control, Rainbow Speaker Upgrade, Sony SOT Amp, HK Sub, CCFL, Intravee II, NightMode.