pygtk crashing when using gtkmozembed

[moumita]

hi all,
I am trying to execute one simple program using pygtk-2.8.6 and
gnome-python-extra-2.12.It's crashing at the time of executing the
follwing instruction.
---------------------------------------------------------
 self.moz = gtkmozembed.MozEmbed()
-------------------------------------------------------
python is able to import the gtkmozembed module.
plz help.
Thanks,
Moumita