Ummmm, I'm not sure actually LOL are you opening it in windows media player?? If you are (that's what I viewed it in) and it still isn't working maybe you don't have the correct codecs... when you try viewing them, does it give you an error in a popup window?? Or can you right click and view the error? Because usually then you can click on a link for more information or it will take you to microsoft's website where, if it can be fixed, it will tell you what to do