Elder70, Have you tried viewing this movie on a regular DVD player to see if you still get the pauses? These could be caused by poor media or too fast a burn speed, just to name a couple of things. If you could post a log of the burn for us we could see more needed info to try and help you. Sorry, can't help you with the xbox part of your question, but there's other members that are into Xbox and they will surely be able to help you out.
* To get the log: open Img>help>Img logs. Then just copy and paste to a post for us.