Tobiassaibot, You said you can play the file after dn/ld with WMP??
See this post for codec just in case.
http://www.gnutellaforums.com/downlo...wire-play.html.
It might not hurt to go ahead and dn/ld the codec pack. I know WMP is lacking some codec. Hope this helps.
There is also a very good media player mentioned in this post if you want to try it out.