Dvd shrink problem

After I copy a dvd using dvd shrink when i play it back all i can hear is the music but nobodys voice? Can anybody tell me how to fix this?

Sorry mods, just figured out what the problem was and it has nothing to do with dvd shrink so you can close this thread.

please can anyone help when i playback my backed up dvd half way through it freezes and jumps like frame by frame i used dvd shrink