I'm not a Linux user, but I would try VLC media player. It works with quite a few OS's and plays most anything.
EDIT: And therock003, in the future please use a more descriptive subject title in your posts to allow others to search for similar topics. I will change yours this time. From our rules:Thanks,Try to choose a subject that describes your topic.
Please do not use topic subjects like Help me!!! or Problems.
Moderator redwudz