freeradius 3.0.4 can't contact LDAP server

hello I'm using freeradius 3.0.4 on CentOS 7 with a LDAP server, ApacheDS M20. I have configure radius.conf, clients.conf and ldap file module. The debug command radiusd -XC returns the configuration is good. But it returns : rlm_ldap: Falling back to build time libldapversion info. Query for LDAP_OPT_API_INFO returned -1. rlm_ldap: libldap vendor: OpenLDAP version: 20439. and the server can't contact LDAP server at the starting. I'm test with a ldapsearch command with the same information and i have no error. A solution is possible to make a contact between the servers ? Thanks. Denis Blangille