Error in CLM nightly user sync using LDAPS

Apologies if this has been asked and answered before.

I am trying configure JTS to sync users from a corporate LDAP with only secure port.

In the Advanced Properties, com.ibm.team.repository.service.jts.internal.userregistry.ExternalUserRegistryInternalService section, I have User Registry = LDAP

And further on, in "LDAP Registry Location" I have "ldaps://server:636".

Now when I run repotools -syncUsers I get the following error in my jts.log file

2012-03-09 13:21:01,461 ERROR .internal.userregistry.ldap.LDAPNightlySyncService - javax.naming.CommunicationException: fds.jlrint.com:636

There does not seem to be any documentation on configuration to use LDAPS All documentation seem to be on LDAP only.

Has anyone solved this or where cn I find documentation.

thanks