Why is Windows Movie maker crashing on me?

Hi! I anve a video file that I want to drop in Windows Movie Maker and manipulate. It is a 40 minute video (I have it as an MPG and AVI. As soon as I load the thing in, WMM crashes. In the Event Viewer, I get this reason: “Faulting application moviemk.exe, version 2.1.4027.0, faulting module mpeg2parser.ax, version 1.2.0.79, fault address 0×000088f2.”

I am on a DELLL XPS M1710 laptop with 4 GB of RAM running XP with Service Pack 2. Any idea what is going on? Thanks!