[HELP] Connection With the server interrupted

Hello guys, yesterday my server was working with no problems, but today when i login on the client, i get the error msg:
Connection with the server interrupted try again.
PS: I Get "Welcome to EUdemons Online" message.
Where is the problem?

ty!

edit:
there is no errors on MSG, NPC and ACC..

check your error logs for login/logout data in the account and message server it'll tell ya why ur disconnecting