GtkBuilder + GtkUIManager and connect_proxy signal.

[Alessio Giovanni Baroni <alessiogiovanni baroni gmail com>]

Hello,
I am writing an application using an XML file for defining the interface,
with GtkBuilder + GtkUIManager.
The most important parts of XML file are:

....................
    <object id='ui_manager' class='GtkUIManager'>
        <child>
            <object id='action_group' class='GtkActionGroup'>
                <child>
                    <object id='file' class='GtkAction'>
                        <property name='label'>_File</property>
                    </object>
                </child>
                <child>
                    <object id='file_new' class='GtkAction'>
                        <property name='label'>_New</property>
                        <property name='stock-id'>GTK_STOCK_NEW</property>
                        <property name='tooltip'>Start a new source
file</property>
                        <signal name='activate'
handler='on_file_new_activate' object='notebook' swapped='FALSE' />
                    </object>
                </child>
                <child>
                    <object id='help' class='GtkAction'>
                        <property name='label'>_Help</property>
                    </object>
                </child>
                <child>
                    <object id='help_about' class='GtkAction'>
                        <property name='label'>_About</property>
                        <property name='tooltip'>Show informations about the
application</property>
                        <property name='stock-id'>GTK_STOCK_ABOUT</property>
                    </object>
                </child>
            </object>
        </child>
        <signal name='connect-proxy' handler='on_connect_proxy' />
        <signal name='disconnect-proxy' handler='on_disconnect_proxy' />
        <ui>
            <menubar name='menu_bar'>
                <menu action='file'>
                    <menuitem action='file_new' />
                </menu>
                <menu action='help'>
                    <menuitem action='help_about' />
                </menu>
            </menubar>
        </ui>
    </object>
        ........................
                <child>
                    <object id='menu_bar' class='GtkMenuBar'
constructor='ui_manager' />

Now, to write the tooltip on the GtkStatusbar, I specified the signal
'connect_proxy', where I will connect the 'select' signal of GtkMenuItem.
The problem is that the 'connect_proxy' is not emitted!
How can I do?

Thanks.