I go in to the manager, find an existing extension, edit it with the new extension number, user name source number, etc. I then merge the configuration, which is saving it, and then exit. When I go back in to the manager to look at the changes, it goes right back to 'Nouser' at the extension I'm trying to configure. What are the actual steps? What do I change first? Extension form, user form or what? Also, what is the proper way to send the config back to the system after editing it?