Having some issues with Windows Movie maker?

First of all, i have a video im trying to publish, but whenever i do, it says it cant be published due to lack of disk space. Well frick, i love makin videos, so i took the que and copied all the ones ive made and put it on a disk. so now theres nothing in my "Videos" Folder. And i go bto Publish it and it says the smae thing. Theres nothing even there! Even if there was, its only a couple hundred megabytes. I reduced the quality to 4MB and its STILL wouldent work. PLESE HELP