Videos won't loop continuously... help!

Hi everyone! I’m in the process of making a video reel flash animation and I’m experiencing a problem. The animation itself loops continuously and seamlessly, but the videos inside the animation do not. Each video is about 17 seconds long, so once the animation reaches the 17 second mark, the videos stop playing. Only the first frame from each video shows up while the rest of the animation keeps going!

ANY thoughts or suggestions on how to get the videos themselves to loop would be very much appreciated. =)

By the way, I turned the videos into a movie clip symbol in order to get the infinite scrolling effect (refer to http://www.kirupa.com/developer/mx/infinite.htm). Maybe this can’t be done successfully with actual video footage?

Thanks!
Nicole