How to setup MSN Messenger 6.1 over corporate firewall ?

MSN Messenger 6.1 change port to TCP 1863
-----Original Message-----
Hi,

My company use Application and Content Networking System
Software 4.2.9 open port HTTP:80 HTTPS:443 FTP:81
I use Windows XP Pro with ICF and MSN Messenger" 6.1.0155.

I find some info "Windows Messenger in Windows XP:
Working
With Firewalls and Network Address Translation Devices"
http://www.microsoft.com/technet/pro.../winxppro/depl
o
y/worki01.asp

I try redirecting UDP/TCP ports 1503/3389/5060/6891 via
firewall.acme.com:[80|443]. Install HTTP-Tunnel 2.8.2390
and still not working. CISCO ACNS port 443 most friendly
for tunnel. HTTP-Tunnel not working with 443 over
Firewall. For me most interesting is Messenger Remote
Assistance option. Please help
Thanks in anticipation

Marek
.