Try using the RipIt4Me front end - it adds new copy protection coverage for DVD Decrypter.
http://www.ripit4me.org/download.html
Just download the Installer and install it over the top of DVD Decrypter and it should be ok.
If that does not work, try
DVDFab Decrypter, the free version:
http://fileforum.betanews.com/detail...r/1132478833/1
Good luck.