Error message when trying to access a server

[Kaldorr]

http://img820.imageshack.us/img820/6391/eqemuerror.jpg (http://img820.imageshack.us/i/eqemuerror.jpg/)

[trevius]

Does that happen for all servers, or just 1 in specific? When does the error happen exactly? The more details, the better. We can't make much out of an error box like that with no info.