Gtk::HBox in a Gtk::VBox, help!

[jalqadir netscape net (Jamiil )]

I am trying to write a class that derives from Gtk::VBox called Contacts, the idea is to pack every widget necessary to display and retrieve data from the user. This class will be passed to a Gtk::Notebook::append_page as te widget to be displayed.
The class compiles just fine, but at the point where I add the Gtk::HBox object to the Gtk::VBox derived class the program craches/segmentation fault.

Could someone please tell me what I am doing wrong?

Here is the example:
==========
WinXP
MinGW-GCC

class Contacts : virtual public Gtk::VBox{
protected:
   Gtk::HBox hbox1;
   Gtk::HBox hbox2;
   
public:
       Contacts();
       virtual ~Contacts();
}; //class
jme::Contacts::Contacts(){
   this->pack_start(hbox1); //Segmentation Fault
}
==============

TIA
-- 
* You cannot exercise your power to a point of humiliation.
                       - Jean Chretien

* It's amazing how the small seeds of distrust and misunderstanding
can yield a crop of hate and death...

* If that document has fine printing anywhere, just chuck it in the garbage
                      - Jorge Escalante
Ma'assalama! Adiós! bye!


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