http://messenger.jonathankay.com/problem.aspx?ID=17
Solve a Messenger problem
Setting up Video and Voice over a router/non-XP firewall or NAT
Solve ID: 17
Summary:
If you are using a hardware router or non-xp internet sharing service you will
not be able to use Video and Voice in Messenger. Messenger uses a technology
called Universal Plug and Play (UPnP). Currently the only internet sharing
(NAT) software that is UPnP compatible is the built in Internet Sharing
included with Windows XP. Hardwar
