Welcome to the forum
DVD Shrink is not more updated, so its ripping capabilities are really limited. I suggest to use a different software for your rippings.
Currently, the better choices are AnyDVD and RipIt4Me. With one of these solutions you should be able to rip that disc.
If the disc is scratched, all problems due to scratches cannot be solved by any ripping software. The only thing you can try is to use a different drive, because different drives have different error correction capabilities.