it stll can be firewall, i no my firewall lets me on warrock until i reach the login screen, once im there, if i try to login, AVG blocks the port, so i have to turn it off, until i set the port too allow.
It happend to me. whenever u try to login nothing happens at all. jsut check ur firewall. Theres a good chance that if u were banned they would make a popup window that will tell u that u wer banned.