Regarding the NetscapeRoot:
http://directory.fedoraproject.org/wiki/Architecture
* o=NetscapeRoot
This subtree contains the configuration information of other Netscape servers, such as Administration Server. The Administration Server takes care of authentication and all actions that cannot be performed through LDAP (such as starting or stopping).
You didn't add the user under that did you? I assume you should have your own directory and added your new user under "People" within that.

