[OpenSER-Users] Openser can not load LDAP module

Hello, I am running Openser 1.3.X with MySQL authentiocation and i decided to LDAP instead of MySQL. I did the following: - Reconfigated the Makefile and i took ldap from openser Makefile in (exclude_modules?=) in order to include LDAP module ls /usr/local/lib/openser/modules/ acc.so benchmark.so diversion.so gflags.so mangler.so mysql.so pike.so speeddial.so uac.so alias_db.so cfgutils.so domainpolicy.so group.so maxfwd.so nathelper.so registrar.so sst.so uri_db.so auth_db.so db_berkeley.so domain.so h350.so mediaproxy.so options.so rr.so statistics.so uri.so auth_diameter.so dbtext.so enum.so imc.so mi_datagram.so path.so siptrace.so textops.so usrloc.so auth.so dialog.so exec.so lcr.so mi_fifo.so pdt.so sl.so tm.so xlog.so avpops.so dispatcher.so flatstore.so ldap.so msilo.so permissions.so sms.so uac_redirect.so - then i added the module in openser.cfg (loadmodule "ldap.so") - When i compile the configuration file i get the following: ERROR:core:sr_load_module: could not open module </usr/local/lib/openser/modules/ldap.so>: /usr/local/lib/openser/modules/ldap.so: undefined symbol: ber_pvt_opt_on Apr 16 17:26:45 [8172] CRITICAL:core:yyerror: parse error in config file, line 83, column 13-14: failed to load module i have no idea from where to start or what to check. can anybody help me? Ahmed ALALI