I downloaded the WOTLK client and everything seems to be ok except when i load into the Lordaeron server i get kicked within a minute or 2 with generic "you have been disconnected from the server" my internet connection is fine and i can play for hours on the MoP servers and retail without any issues so it has to be something to do with the server.

Only result i found on here was something about anti DDoS but i never done anything like that so i'm not sure whats going on.