heys guys, and gals

i have downloaded a bodybuilding video in 2 parts from limewire.

when i open the file it says at the bottom of windows media player:

opening media - locating codec server - downloading codec - error downloading codec

then we have no sound on the video.

is this a problem with the video or is there a way of getting sound on the vid ? i have allready gone to microsoft and updated my codecs but it still searches for one? help me please, im well gutted it was like 1400 mb - took ages to download =)