try ripping to your hard drive first with dvddecrypter, works for me.
Or try dvd2one.
I use dvdshrink all the time, on the odd 1 or two disks that it doesnt work with i rip to my hard drive then switch to dvd2one, which usualy works.
I hope this is some help to your problem.
(i have copied this disk with dvdshrink with no problems)