Why won't my laptop play my video i made on windows live movie maker?

I made this video on my windows 7 acer netbook using Windows Live Movie Maker and i am trying to play it on my Advent, windows (or home) vista laptop. The actual title and captions appear but the video clips just don't show up? PLEASEEEEEEEEE tell me what to do so i can play it on my other laptop/?? THANKSSS! Its a school project!!!