Windows Vista Can't Access 2nd Picture On DVD With HP Quickplay

[Celestra]

This doesn't happen all the time, most of my DVDs work on Quickplay. The system has been recently updated-re-installed. I can read both movies on the title page, but when I actually play the movie, only the 2nd picture is accessible. There are no buttons to push to get to it..... (When I first put the DVD in after the update I could access both movies)