sending commands in body of HTTP with urllib2

[Astan Chee]

Hi,
Im trying to implement the logic from 
http://www.hypothetic.org/docs/msn/general/http_connections.php to a 
simple python code using urllib2 and some parts of urllib. Im behind a 
http proxy that requires authentication that is why Im using urllib2. Im 
asking for help on how to send commands in a body of a HTTP before 
requesting for response. What am I doing wrong? I only get the response 
from the server but my commands never seem to be acknowledged or 
properly handled. Below is my code:

import urllib2
import base64
import urllib

USER='user'
PASS='pass'

proxy_info  = {'host' : "proxy.com.au",'port' : 8080}

# build a new opener that uses a proxy requiring authorization
proxy_support = urllib2.ProxyHandler({"http" : \
"http://%(host)s:%(port)d" % proxy_info})
opener = urllib2.build_opener(proxy_support, urllib2.HTTPHandler)

user_pass = base64.encodestring('%s:%s' % 
(urllib.unquote(USER),urllib.unquote(PASS)))
authheader =  "Basic %s" % user_pass

opener.addheaders = [('Accept-Language','en-us'),
                     ('Accept-Encoding','gzip, deflate'),
                     ('Host','gateway.messenger.hotmail.com'),
                     ('Proxy-Connection','Keep-Alive'),
                     ('Connection','Keep-Alive'),
                     ('Pragma','no-cache'),
                     ('Content-Type','application/x-msn-messenger'),
                     ('User-agent','MSMSGS'),
                     ('Accept','*/*'),
                     ('Proxy-authorization',authheader)]

# install it
urllib2.install_opener(opener)

# use it
url = 
'http://gateway.messenger.hotmail.com/gateway/gateway.dll?Action=open&Server=NS&IP=messenger.hotmail.com'
values = 'VER 5 MSNP8 CVR0'

f = urllib2.urlopen(url,values)
print f.headers
print f.read()

Thanks for any help!