I need some help with Portal - LDAP connection

Hello...

Can some one please help me with an issue I have when I try to connect a Portal in version EP6.0, with an LDAP, I go to System Admin --> System Config --> UM Config --> LDAP Server, Test the connection, it's successful, then restarted the server, but I still can't see the users at the LDAP.

Hope some one can help me soon.

Miguel