I see your attempts in the log files... each time you tried a different name (like JKla, jkla, etc.), it says
(2010:09:05-07:55:40.210155) CGAS error message: User not found
And when you used J'Kla, it says
(2010:09:05-08:03:45.244209) CGAS error message: Password is wrong
However, I do not see anyone else having a ' in the name, so maybe that is indeed the problem. Before I do any further debugging, could you please triple-check that the password is really correct? Because, obviously, the username gets transferred correctly and is found in the database by the server.