Max 6 demo error in reading video files

Hi,

I am having trouble with the Max 6 demo closing down on me. This is happening: a) whenever I try to trigger a movie to play using umenu & jit.qt.movie (either in combination with urn or by clicking on the umenu item myself), and b) whenever I try to add a mov file into the patch by dragging it from the Max Browser. I have tried populating the umenu with mov, m4v, and avi files, and I get the error regardless.

I am using the exact same arrangement of objects that I was previously using in Max 5, and the exact same video files. The only difference is that I have switched jobs/countries/computers, and am now using the Max 6 demo on Windows 8 instead of Max 5 on a Mac. I don't have access to my old Mac anymore, so I can't test whether this is a problem with the demo, the patch I've constructed, or the computer.

This should be the simplest thing to do, and I've never had any problem with it before. Is there something I've overlooked, or is this just a glitch with my demo download? I have extracted & attached the troublesome part of my patch. Thanks for your help.