iPod Trouble ripping Pixar DVDs - need help

I am running Windows XP (sorry Mac folks). I am using DVD Decrypter and Videora to rip DVDs and run on iPod. I have no problems with the majority of the movies I've tried. However, I can't get The Incredibles or Toy Story 2 to work. The audio works fine, but I am missing about 7 seconds of video, so they aren't linked up. I've tried 2 different Incredibles discs and neither worked. It happens about 2 minutes into the movie right when they show The Incredibles name and go into the car chase.

Anybody else have these problems with these or any other movies?

Any suggestions on how to fix it?
Thanks

Disc isn't scratched. Also, I used 2 different movies. I tried ripping my copy and then borrowed my brother's and it did the same thing. They were both missing the same 7 seconds of video at the 2 minute mark. Besides that, all the rest of the video of the movie worked fine. The entire audio worked, as well.

Don't know about the ArcCos protection.

My Toy Story 2 did the same thing, however Monsters, Inc, Finding Nemo, and A Bug's Life worked great and had no problems. I haven't tried Toy Story, yet. I thought it may be a Pixar thing they do with their discs.