vmars 0 Light Poster

Greetings,
I am stepping thru the "Changing a PythonCard Application"
@ http://pythoncard.sourceforge.net/walkthrough1.html
With NO changes, pgm runs fine.
But when I make the change and run it
program just Flashes a Console screen
and immediately ends.
Can someone spot the error?
#!/usr/bin/python
"""
__version__ = "$Revision: 1.8 $"
__date__ = "$Date: 2005/12/17 15:20:02 $"
"""
# from PythonCard import model <==Original, next line = change
from PythonCard import dialog, model
class Minimal(model.Background):
def on_menuFileAbout_select(self, event):
# result = dialog.alertDialog(self, 'It works!', 'Showing
Off') <==Original, next line = change
result = dialog.alertDialog(self, self.components.field1.text,
'Showing Off')
if __name__ == '__main__':
app = model.Application(Minimal)
app.MainLoop()

Thanks...Vernon