Movie Says Acquring License

hey,not sure if im in the right place for this but it sounds codec like
i downloaded the file [tmd]dawn.of.the.dead.2004.divx.(KaSS).TS and when i click on it its opens in wmp and then starts to say acquiring license, and after waiting awhile another window pops up saying DAWN OF THE DEAD and has a little option of play or cancel but the play buttom doesnt get highlighted so i cant play it, does anyone have any idea how to get it to play or am i better of deleting it and trying to download another version , ive never heard of getting a license to play it before, thanks for any help :D