Yea I hate those "DVD ripper,copier,w/e" programs that cant get around the CSS encryption, they're worthless. Now I am not familiar with DVD Ripper Pro but I have had great success with
#1 DVD Ripper , however $34.95 is a little much so if you download a trial I found a serial # online that you can use to crack it on one of the various crack sites. Also check out DVD Decrypter, its free and I've heard good things (it might be shut down but, look around, there must be other sites that have it).