Not certain if you're still having problems with DVDDecrypter when attempting backup of "Hitch", or even care but...
I'm running a Sony Vaio GRS laptop 2.2 Ghz P4M / 1024 mg ram. For DVD movie backup I use DVDDecrypter 3.5.4 and DVDShrink with 99.9% success. Only two movies I've encountered I could not backup with the program settings at installation default. Resident Evill 2 and a documentary call "Outfoxed". The former I imported DVD Decrypter specific settings to ignore read errors. The latter I was never able to backup.
"Hitch" copied perfectly first time out. I can only suggest a couple of things for you to try off the bat here. Some obvious others not so.
Be certain your Drive's firmware is up to date.
Also look on the web for a file called aspi_471a2.exe. It's the aspi update that dvddecrypter uses to function optimally.
Be certain your optical lense and disc are clean.
Beyand that look me up at Gntlmnwnedge@YH-dot-com and I'll try to help more.