libglademm problem

[David Wilson <miwilso2 vt edu>]

im using the derived widgets to make my UI like in the gtkmm book.

http://www.gtkmm.org/gtkmm2/docs/tutorial/html/ch19s03.html

how ever when I link the main.o file I get this
main.o: In function `TenetWoes*
Gnome::Glade::Xml::get_widget_derived<TenetWoes>(Glib::ustring
const&, TenetWoes*&)':
/usr/include/libglademm-2.4/libglademm/xml.h:248: undefined reference to `typeinfo for TenetWoes'
/usr/include/libglademm-2.4/libglademm/xml.h:264: undefined reference
to `TenetWoes::TenetWoes(_GtkWindow*,
Glib::RefPtr<Gnome::Glade::Xml> const&)'

im using ver 2.6.1 of libglade and gcc 4.0

David Wilson