Vista - windows dvd maker wont let me add video files (stops working)

whenever I start up windows dvd maker and click "add items" and select a
video clip to add I always receive a page saying "windows dvd maker has
stopped working." This happens with all my video clips except for the sample
video clips which came with windows vista.

One solution which windows gives me is to download the latest Divx, however
windows dvd maker still does not work.

are there any other answers/solutions which are available?

help is appreciated