It looks like you are missing the connection to your directory server.
Right-click on the Directory Servers folder and use the "Add Connection" option
On the General tab, enter the hostname and Base Distinguished Name (DN) of your namespace in the directory server, then click Test to make sure it is valid.
On the Runtime Credentials tab, enter the Administrator DN after the 'cn=' (this is often "Directory Manager" then add the password and test.
On the Ticket Service tab, add your Ticket service hostname and port number, and test again.
Finally click OK, and your Directory Server should appear, and you can expand it and log on, then add users to your heart's content.
Regards,
MF.