WotLK "You have been disconnected from the server."

Hi! I just joined the forums, and I downloaded the WotLK client from the Warmanel links provided. Every time I try to login, it goes to 'Authenticating' and then says 'You have been disconnected from the server.'

I've got the config settings changed and the realmlist changed. I followed all of the guides. It's exempt in my firewall, and I even have a VPN (without a vpn, it stays at 'connecting' and disconnects me). I've basically exhausted every avenue that I can think of.