Failing to wrap GConfClient

["Daniel Joseph Sherman" <sherm126 msu edu>]

Pretty new to gtkmm programming.  Having some problems getting gconf up and 
running. 

The line:
RefPtr<Gnome::Conf::Client> conf = Gnome::Conf::Client::get_default_client() 

Is giving the runtime error:
failed to wrap type of 'GConfClient' 

Is there any common reason for it?
This is the first invocation of Gconf, and gtkmm has been initialized 
(Gtk::Main kit(argc, argv);)