Hello, okay, here. In your inter_athena that is where your MySQL username and password lies. You place them in there, however in char_athena and map_athena( or login_athena, I forgot) userid and passwd, that is your server's userid and passwd, your MySQL username and password is not the same with the userid and passwd of your server.
Place your MySQL username and password in your inter_athena.conf.
Place your userid and passwd in your ragnarok->login table if you do not remember something like this it should be
account_id = 1
userid = userid of char_athena and login_athena (again, I forgot)
passwd = passwd of char_athena and login_athena
Your username in your MySQL Installation that would be your inter_athena ID.