I'm so bummed...

Sadie learned how to wave today... she wants to do it NON stop! Its so cute! Good thing... we got it on camera. Bad thing... we can't figure out why it wont play on our computer. I wanted so badly to email it out and to put it on here! I wish I knew what I did wrong. Maybe I have the wrong type dvd? I know that it plays in our DVD player in the living room, just not on the computer. The computer doesn't even recognize that there is a disk in there. Maybe all you computer savy people can help!!! PLEASE :(