[pygtk] gnome.ui AppBar(status bar issues)

[Mystilleef]

Hello,

I'm using gnome-python-2.10. I can't seem to push, pop or set anything
to gnome.ui's AppBar widget. I'm getting the following warning
messages.

/home/ubuntu/Desktop/scribes/scribeslib/editor_async.py:1157:
GtkWarning: gtk_label_set_text: assertion `GTK_IS_LABEL (label)'
failed
  self.status_one.pop()
/home/ubuntu/Desktop/scribes/scribeslib/editor_async.py:1158:
GtkWarning: gtk_label_set_text: assertion `GTK_IS_LABEL (label)'
failed
  self.status_one.push(string)
/home/ubuntu/Desktop/scribes/scribeslib/editor_async.py:1190:
GtkWarning: gtk_label_set_text: assertion `GTK_IS_LABEL (label)'
failed
  self.status_one.pop()
/home/ubuntu/Desktop/scribes/scribeslib/editor_async.py:1191:
GtkWarning: gtk_label_set_text: assertion `GTK_IS_LABEL (label)'
failed
  self.status_one.push(string)
/home/ubuntu/Desktop/scribes/scribeslib/editor_async.py:795:
GtkWarning: gtk_label_set_text: assertion `GTK_IS_LABEL (label)'
failed
  self.status_one.pop()
/home/ubuntu/Desktop/scribes/scribeslib/editor_async.py:796:
GtkWarning: gtk_label_set_text: assertion `GTK_IS_LABEL (label)'
failed
  self.status_one.push(string)

Here are excerpts from my code:
gnome.program_init("App", "App_version")

def create_status_one(self):
				
		status_one = gnome.ui.AppBar(True)
		status_one.set_homogeneous(True)
		status_one.set_double_buffered(True)
		status_one.set_default("")
		self.status_one = status_one

		return self.status_one

def load_string_timeout(self):
		
		string = "The file \"" + self.filename + "\" is open"	
		self.status_one.pop()
		self.status_one.push(string)

		return False

gobject.timeout_add(7000, self.load_string_timeout)

What am I doing wrong? 

Thanks