I Need Urgent help with Windows movie maker I NEED a good answer FAST!! 10 PTS!!!?

okay, i am hosting leviathan week on Youtube, i amm nearly done with all 7 posts! i have 3 more. i cannot post my movie for the day because there is a popup that says that i am already in a windows movie maker session and that i need to close it before i start another one. I need help fast! i need to post my movie like i said. PLEASE HELP!