Accessing Users Created without a password


I have a test installation of RT 3.0.2 running now on my system. Everything seems to work just fine EXCEPT that I cannot change a user from non-Privileged to Privileged as SuperUser! I try Configuration -> Select User -> User is name and even check the box to “Include disabled users in search” and still just list the Privileged users. The non-Privileged uses don’t get listed so I can make changes on their rights etc.

I know the user is in the database because I cannot add a new user with the same user name or email address. I have been through the documentation but I can’t find out how to access these users. What am I missing?

Thanks For your help.