LDAP module does not work with chroot

Hi, When I try to run FreeRadius chroot'ed, LDAP modules gives the error: ldap_url_parse_ext(ldap://ldap.cs.ait.ac.th:389) ldap_bind ldap_simple_bind ldap_sasl_bind ldap_send_initial_request ldap_new_connection 1 1 0 ldap_int_open_connection ldap_connect_to_host: TCP ldap.cs.ait.ac.th:389 ldap_connect_to_host: getaddrinfo failed: hostname nor servname provided, or not known ldap_err2string but it runs fine if I do not chroot. Any idea what that could be? A missing library in the chroot environment? TIA, Olivier --