FR 3.x | rlm_ldap | bind as user?

Hello list, With FR 2.2.0 (fedora 18), my users are authenticated using "bind as user" from rlm_ldap (EAP/TTLS-PAP). However, i am not able to have the same behaviour with FR 3.0.1 (fedora 20). I didn't copy my old ldap configuration from 2.2 to 3.0, but created a new one from the sample file. Is it still possible to authenticate with ldap "bind as user" in FR 3.0? Or do i need to provide an admin account to rlm_ldap for browsing into the ldap database? Cheers, Erwann