Connection problems using Live Messenger 2011 in Windows 7(seven)

I've just updated my messenger to the most recent version, and instantly got problems at work because I'm behing a proxy.

After I trial and error I just found out that all I need to do was to configure the proxy by command-line

Just do what I say in the link below

http://tkingarthur.blogspot.com/2010/10/proxy-configuration-windows-7-seven.html

For other windows use

proxycfg - p server_ip:port_number