System Error

[Thiago Cavalcante]

Maintaining the system is not working.
Trying to run the console displays error message:

tlcavalcante at tlcavalcante:~$ /usr/share/computerjanitor/computer-janitor-gtk
ERROR:computerjanitor:Cannot contact Computer Janitor dbus service; try again.
Traceback (most recent call last):
  File "/usr/share/computerjanitor/computer-janitor-gtk", line 59, in <module>
    main()
  File "/usr/share/computerjanitor/computerjanitorapp/gtk/main.py",
line 31, in main
    ui = UserInterface()
  File "/usr/share/computerjanitor/computerjanitorapp/gtk/ui.py", line
73, in __init__
    proxy = system_bus.get_object(DBUS_INTERFACE_NAME, '/')
  File "/usr/lib/pymodules/python2.6/dbus/bus.py", line 244, in get_object
    follow_name_owner_changes=follow_name_owner_changes)
  File "/usr/lib/pymodules/python2.6/dbus/proxies.py", line 241, in __init__
    self._named_service = conn.activate_name_owner(bus_name)
  File "/usr/lib/pymodules/python2.6/dbus/bus.py", line 183, in
activate_name_owner
    self.start_service_by_name(bus_name)
  File "/usr/lib/pymodules/python2.6/dbus/bus.py", line 281, in
start_service_by_name
    'su', (bus_name, flags)))
  File "/usr/lib/pymodules/python2.6/dbus/connection.py", line 620, in
call_blocking
    message, timeout)
DBusException: org.freedesktop.DBus.Error.Spawn.ChildExited: Launch
helper exited with unknown return code 1

Thanks!