ok here is the deal, videolan has its own codecs so with that you can tell if its a codec issue or not. if vlc plays it fine then its codecs but if you have a problem in vlc then its either the graphic card, drivers for the graphic card or the file itself.
what kind of a file is it? put it in gspot
and see what gspot says.
your klite should have come with gspot check its folder in teh start menu
if not download from the link I provided