Dang Preloaders

Hey everyone! Im creating a preloader for my website right now but whenever I test the movie the percentage text says NaN (not a number?) anyway and the bar doesnt move, it doesnt go past this point. I put the preloader in the middle of the movie instead of at the beginning, what is going on here? Some of the content is about 5 blank frames after the movie but does tha matter? I put a picture right after it and it still did it. What should I do? Ive used this script before and its worked wonderfully. Please Help ASAP!