[xwiki-users] LDAP Authentication

Hello All, I have installed XWiki in our environment using jetty and MS SQL Server. I have successfully configured authentication using LDAP but I don't see any users when I click on Users and Groups under Administration. I guess this is because XWiki just uses LDAP to authenticate but doesn't stores the users anywhere. I checked on mailing lists and found that few discussions where people have suggested to add following line in xwiki.cfg xwiki.authentication.createuser=ldap and XWiki will start storing users in his database. But the above didn't work for me. I also found a snippet which might import the users but don't know how to run it. I am a .Net guy and I have very limited knowledge of java. I would like to create groups of LDAP user and give different permissions to different groups. How can I achieve this? Thanks, Avinash