Trouble making applet. Hope you guys can help.

[quality_sam]

Hi Guys, I'm trying to write my first python applet. Now i can make an applet they displays text, or a pythin program that access a config file. But the moment i do both, the applet displays only a single white pixel on the taskbar. Code is below. If i leave like this, it displays text. If i uncomment the comented lines, it displays a pixel. With run-in-window parameter it runs fine. Does anyone have any ideas please? I'm stumped.
!/usr/bin/env python

import pygtk import sys pygtk.require('2.0')
import gnomeapplet import gtk
def factory(applet, iid):
# import ConfigParser
# config = ConfigParser.ConfigParser()
# config.read('usage.cfg')
# done=str(config.get('main', 'used'))
done="65Gb"
label = gtk.Label(done)
applet.add(label)
applet.show_all()
return gtk.TRUE
def showAboutDialog(*arguments, **keywords):
pass
if len(sys.argv) == 2:
if sys.argv[1] == "run-in-window":
mainWindow = gtk.Window(gtk.WINDOW_TOPLEVEL)
mainWindow.set_title("Ubuntu System Panel")
mainWindow.connect("destroy", gtk.main_quit)
applet = gnomeapplet.Applet()
factory(applet, None)
applet.reparent(mainWindow)
mainWindow.show_all()
gtk.main()
sys.exit()
if name == 'main':
print "Starting factory"
gnomeapplet.bonobo_factory("OAFIID:GNOME_usage", gnomeapplet.Applet.__gtype__, "Simple gnome applet example", "1.0", factory)