Sometimes the LIVE Server and individual Provisioner Nodes get out of sync with each-other and you cannot see them from the LIVE Server interface page (even if everything is connected and running properly). To remedy this the LIVE Server needs to be restarted.
This can either be accomplished by rebooting the actual LIVE Server Machine or by simply stopping and starting the LIVE Server Application:
To stop the LIVE Server Application simply highlight the program window on the LIVE Server (it is a basic command line application) and press "Enter". The system will go through its shutdown process and close when it is completed.
To start the LIVE Server Application simply double click the shortcut on the desktop, or navigate to its location in the Windows Start Menu.