Unable to validate game version

Hi

I downloaded WOW from torrent site and installed all the patches to 2.1.0

Now i'm using wowstatus.net to find private servers to play on, but when i click on "Connect" and it loade wow and i try to login, i get "Unable to validate game version.. This may be caused by.... Please visit ...." error...

Do i need some kind of no cd crack or something?

I tried a few servers but i always get this.. Did i forgot to do sometbing before i can play?

Thanks..

you have to up or downgrade to the current wow version from the P Server u whant to play off