a little help needed.

i’m having the standard problem of not being able to play some avi’s in windows media player.
i downloaded a few and tried to play them but it says:

Windows Media Player cannot play the file. One or more codecs required to play the file could not be found.

i have divx pro codec and this codec pack:
http://www.free-codecs.com/download/K_Lite_Mega_Codec_Pack.htm
i thought that would work because it has a shitload in it but it didnt.

can anyone recommend any other codecs/codec packs so i can watch a movie?
thanks.