Sounds without image
 

Help!
I've just downloaded somthing from Limewire and i tried to play it on Window media Player. The screen stayed black while i could hear the sounds. I went to the help section and found a software to download (something to do with codecs), i installed it but oit's still not working, it says that the player need to be re-started or something. How does one re-start a Player? i've tried everything. Should I uninstall media player and download it again?
Please help !!