Disconnected from server???

When i type my password to log in i am not taken to the usual character select screen. instead i takes me to the server select screen. When i select the server i was on it just tells me 'disconnected from server', and doesn't tell me why.

Does anybody know how i can get back into the server 'Killrogg' (where my friends are)?

Any help would be greatly appreciated!

Cheers!