You will probably need to rip it with DVDFab decrypter which was updated recently. Another choice would be DVD43. Or the best solution would be to run AnyDVD in the background while ripping with DVDDecrypter. AnyDVD handles the newest encryptions. http://www.slysoft.com
The answer to "THE CAVE" is here http://forums.afterdawn.com/thread_view.cfm/282892 -- I made that mini guide, especially for Newbies or for those that have not made any successful backup yet. Check it out and I GUARANTEE you 100% that you'll have a successfully working "full disc" within roughly an hr. Good luck on following the mini guide.