ceguitest events

Hi !
I'm just starting with CS and for now try to understand global behaviour. Considering the ceguitest application, it seems I can't run it with the line:

Code:

btn->subscribeEvent(CEGUI::PushButton::EventClicked,
CEGUI::Event::Subscriber(&CEGUITest::OnExitButtonClicked, this));

It compiles but reaches an exception.
If I remove this line and compile it again, everything works fine but of course button do nothing.

If someone could help me, it seems nobody else encountered this problem...

I'm working with CS 1.4

Thanks by advance