I take it you were using DVDDecrypter as the burning engine from within DVDShrink?
This usually works, but the burning section of DVDDecrypter has been improved immensely by the same author in a program called ImgBurn. ImgBurn is free to download and use. www.imgburn.com
If you want to use ImgBurn automatically from within DVDShrink, you'll need a different version of DVDShrink. You can find it at rapidshare...follow the instructions at this link: http://forums.afterdawn.com/thread_view.cfm/664041
You can also use ImgBurn outside of DVDShrink to burn. Have DVDShrink output as an ISO file. Then open ImgBurn and click on Write Image File to Disc, and import the new ISO you want to burn. You should also set burning speed to something less than maximum speed...I'd suggest 12x for most modern 16x media if you are using a desktop burner.