gnome_program_init() error while loading main window with libglademm

I tried to write a little program that opens loads a window from a glade 
file.
When the program starts I get this error:
GnomeUI-ERROR **: You must call gnome_program_init() before creating a 
GnomeApp
aborting...

Have I to call this function or it is the same og a Gtk::Main object?
Here's my code:
(main.cpp)
 >     Gtk::Main kit(argc, argv);
 >     FogwerGui window;
 >     kit.run(window.get_main_window());

(fogwergui.h)
 > class FogwerGui {
 > ...
 >    Gtk::Window &get_main_window(); // just returns *main_window
 >    Gtk::Window *main_window, *pref_window;
 >    Gtk::VBox *menubox_auto, *menubox_generic;
 > ... }

(fogwergui.cpp)
 >FogwerGui::FogwerGui(MenuManager &m)
 >{
 >    Glib::RefPtr<Gnome::Glade::Xml> refXml = 
Gnome::Glade::Xml::create("fogwer.glade");
 >    if(!refXml) return;
 >    refXml->get_widget("app_main", main_window);
 >    refXml->get_widget("win_pref", pref_window);
 >    refXml->get_widget("auto_menu", menubox_auto);
 >    refXml->get_widget("generic_menu", menubox_generic);
 >    main_window->show();
 >}

Have I to make my class derive from Gtk::Window?
But if I do so, I can't load the window from the glade file... i haven't 
understood anything.

What's wring? and I'm sorry... I can't speak English. I hope you will 
understand me.


 
 
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