It would be helpful if you could check the LDAP logs to see if there was any error there also /opt/opendj/logs
Also, if you could show the ldif for this client, that would confirm any extra metadata about the client.
i.e.
# /opt/opendj/bin/ldapsearch -h localhost -p 1389 -D \
"cn=directory manager" -j ~/.pw -b "o=gluu" 'inum=(insert-client-id)'
note the single quotes around the filter... and put the password in the file ~/.pw (and remove it when you're done).