can not edit network-admin

[xinchen]

> > hi all:
> >  my system is ubuntu8.04.4, i started Network-admin in Terminal by
> use
> > the command "sudo network-admin",but i can not click the Unlock
> button.
> > what's wrong with the system. thanks.
> > 
> > 
> 
> Probably nothing,, are you sure the controls are locked?  You kind of 
> bypass that when you start network-admin as root, (as you do with
> sudo).
> 
> There is no need to use sudo for this, as network admin uses
> policykit. 
>   if you have the privilege to sudo, you have the privilige to unlock 
> the dialogue.
i can not modify anthing, because the "Unlocck" button is grayed out.
and Terminal displays
(network-admin:8366): Gtk-WARNING **: Unknown property:
GtkComboBox.items