I am attempting to add video to my movie. When initially added it is fine and shows up. I save, quit and come back. To my dismay the video has a yellow triangle and an exclamation point. The file that I added is still in tact and able to play, but when I add it to the video it does the triangle/exclamation point thing. This is an intro to a project and I would rather not have to make it every time I make a new video. The file type when I try and add it is either (saved both ways) .mov/.wmv. If anyone can help it would be much appreciated. Thank you very much.

Original title: Movie Maker Issue