urllib and MS proxy. How can I debug?

[kentsin at poboxes.com]

The urllib of python 2.0 does not like the MS proxy. In my 
environment, the proxy is 192.168.83.3:80. I have the following in my 
win98 box :

autoexec.bat

set http_proxy=http://192.168.83.3:80

I try to load a page with

import urllib
a = urllib.urlopen('http://www.python.org/')
print a.read()

This only works once but return null on all other cases.

a.headers is :

>>> print a.headers
Server: Microsoft-IIS/4.0
Date: Wed, 18 Oct 2000 06:40:54 GMT
Proxy-Authenticate: NTLM

How could I debug this?



Rgs,

Kent Sin