Failure on Gnipsel's Custom GUI Tutorial ?

#!/usr/bin/env python

import gtk
import gladevcp.makepins
from gladevcp.gladebuilder import GladeBuilder
import hal

class gui_one(object):

  def on_window1_destroy(self, widget, data=None):
    print "quit with cancel"
    gtk.main_quit()

  def on_gtk_quit_activate(self, menuitem, data=None):
    print "quit from menu"
    gtk.main_quit()

  def __init__(self):
    self.builder = gtk.Builder()
    self.builder.add_from_file("gui1.glade")
    halcomp = hal.component("gui01")
    self.builder.connect_signals(self)
    self.window = self.builder.get_object("window1")
    self.window.show()
    panel = gladevcp.makepins.GladePanel( halcomp, "gui1.glade", self.builder, None)
    halcomp.ready()

if __name__ == "__main__":
  app = gui_one()
  gtk.main()