[RCU] OpenLdap no success

I've tried to address book with openldap, but I have no success:

There is the entry on main.inc.php:

$rcmail_config['ldap_public']['LDAPBEM'] = array('hosts' => '192.168.0.199', 'port' => 389, 'use_tls' => false, 'base_dn' => 'dc=domain,dc=com,dc=br', 'bind_dn' => 'cn=phpldapadmin,ou=ldapadmin,o=sistemas,dc=domain,dc=com,dc=br', 'bind_pass' => 'pass', //'base_dn' => 'o=ENT,dc=domain,dc=com,dc=br', 'search_fields' => array('Email' => 'mail', 'Name' => 'cn'), 'name_field' => 'cn', 'mail_field' => 'mail', 'email_field' => 'mail', 'scope' => 'sub', 'fuzzy_search' => 1);

Please, this is the issue to assign roundcubemail to be a official webmail in my enterprise, but the ldap contacts is the first subject for my users.

Thanks!