openldap proxy issue

hi,

I'am configuring slapd(8) 2.3.27 for use as a proxy to another LDAP server. the purpose is to do an ldap authentication to a ldap backend, that need that an administator account bind to do a search, with applications that can only do an anonymous bind. can openldap rewrite the anonynous connection to bind with the administrator acount instead ? I try this: I compiled with --enable-ldap --enable-rewrite. and my slapd.conf looks like this: database ldap suffix ou=personnes,o=sg uri ldap://192.16.239.210:1389 binddn cn=guards,ou=exploit,ou=personnes,o=sg bindpw secret

but it does not work whereas i put binddn and binfpw. The backend ldap still receive an anonymous connection.

thank you for your help Thomas