self.m_webpage_lock = thread.allocate_lock()

Some lines later:

	## Load webpage
	def LoadPage(self, webpage):
		print "LoadPage1"
		page,webpage = self.RetrievePage(webpage)
		if not page:
			return
		
		## The base URL
		self.m_MainUrl = webpage
		bla = page.read()
		headers = page.info()
		mime = headers.getheader('Content-type').split(';')[0]
		print mime
		global returnvalue
		
		self.m_webpage_lock.acquire()
		self.m_WebDocument.clear()
		if mime:
			returnvalue = self.m_WebDocument.open_stream(mime)
		else:
			returnvalue = self.m_WebDocument.open_stream("text/plain")
		if not returnvalue:
			self.m_WebDocument.open_stream("text/html")
			self.m_WebDocument.write_stream("Error loading page " + webpage + ". Please go back!")
			self.m_WebDocument.close_stream()
			return
		
		self.m_WebDocument.write_stream(bla)
		self.m_WebDocument.close_stream()
		self.m_webpage_lock.release()
		
		print "LoadPage2"

I call that function with:
thread.start_new_thread(self.LoadPage, (self.m_BackPages[-1],))

But in my console, it doesn't print the text LoadPage1(nor does it print LoadPage2).