Vista - Windows Movie Maker 6.0 Editor Stalls - Vista 64 bit

Windows Vista Ultimate 64bit / 4GB RAM / NVIDIA GeForce 7600 GS / Movie
Maker 6.0 (Build 6000)

PROJECT
I'm editing a 1 GB WMV file. MM will play the complete one hour long movie,
however, if I attempt to move somewhere on the time line to prepare to "clip
beginning", for instance, everything comes to a halt. The controls will move
around but the movie is stuck. MM is not crashing per se, it's stalling and
not coming back.

I downloaded 'Video Edit Magic Express' trial, and tested it against the
same file and it works? I want MM to work however because I will be using it
in a class setting where everyone will have it on their computer. Any
ideas - Thanks for your help - IM


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