Why can't I publish my WMM movie?

I have made a 13 minute movie on Windows Movie Maker on my laptop and I can't publish it anywhere. I have tried publishing it to every place it will let me USB, CD, DVD, My videos etc but it won't work. It always comes up with a message saying I should check if the place im saving to still exists, if the files used in the movie are still in the same place and if i have enough space to save it there. I have even tried to publish at the lowest quality of video which only took up several hundred megabytes. HELP?