[squid-users] NTLM and MSN

I think IM clients and squid + NTLM are going to be the death of me.

I'm trying to make my squid work with NTLM + Samba, and everything
seems to be working great from my browser, but when I try to sign into
my MSN client I am met with stunning failure after stunning failure.
Seaching the mail archive show that I should allow the site
gateway.messenger.hotmail.com out directly before my required auth
statements, but this still does not seem to be working. I am still
logging TCP_DENIED (see below)

xx.yy.zz.190 - - [09/Sep/2004:16:24:36 -0500] "POST
http://gateway.messenger.hotmail.com/gateway/gateway.dll? HTTP/1.1"
407 1844 TCP_DENIED:NONE

Here are the relevant portions of my squid.conf

acl MYUSERS proxy_auth REQUIRED
acl MYBADUSERS proxy_auth_regex -i cafriese
acl msn dst 207.46.104.20 207.46.110.0/24

...(I have a series of subnet based ACLs for my internal networks I allow)
acl subnet-10-0-0 src 10.0.0.0/255.0.0.0 (etc...)

http_access deny MYBADUSERS
http_access allow all msn
http_access allow all MYUSERS
http_access allow subnet-10-0-0 (etc...)
http_access deny all

Any thoughts on this matter would be of great help. Thanks!

If this is not enough of my config, I'll gladly share more :)

-- 
--Ziz