Hi again! I fix my problem thanks to your explanations about the usage of the cache! Simply, I use now a new Acegi authenticator: the PasswordComparisonAuthenticator. Before I was using a BindAuthenticator so it was the user himself connecting to the server, and now there is a manager Account that verify the ( principal, credentials ) against the LdapServer and eventually change the user password.
Thank you again, See ya Flavio
