Samba and LDAP

Where can i find samba source or RPM for RedHat Linux 6.2 that compatibily with LDAP. In all packets that i fined in NET i can't compile --with-ldap He's tell me on compile ( configure ) This version is not Ldap Compatibily ( something like this ) ;-) WHAT CAN I DO ? WHERE can i find it ? Thank you for your time ...