Ulead MovieFactory - Always Freezes

I solved the problem. For anyone else who has this problem, download Gspot, run it and use it to check what codecs you have. If you have any which are coloured red, then it is a codec problem. So remove all the codec packs you have on your computer, and then download the all in 1 codec thats what its called, all in 1 codec, and use that, re run Gspot, and you should have no errors in the codecs, and that should be your problem fixed!