It has been a few months since I did any editing but now for some reason Premiere Pro/Encore stops for no reason part way through creating a movie file. It's about 15 minutes long and I have tried quite a few formats but every time it just stops, I am desperate to get a DVD made for my daughter but nothing seems to work. Can any kind person out there shed any light on this, if so it would be very much appreciated.

It's CS4 but I cannot afford to upgrade to CS6 at yet.

Thanking you in anticipation.