WPF Media Element is not playing videos in xp but it is playing in vista

Question

Hi All,

In my application i am using the WPF media element and add the media source to it and when we running on vista environment it is playing

the video but the same application is opening in the xp operating system and run it, we can't view the video. what is the problem here with

Xp-os?and how we resolve this problem. 

if any ways to resolve this problem, please post solutions to this one.

and i want to know what are file formats we can play in the media element. and let we know  the following file formats are played in the

media player  flv swf, youtube video, avi, mpg, wmv etc..

Thanks and Regards

v.s.r.k.raju