I have been trying to fix this all day now. I have a Motorola sbg900 wireless router and it's giving me a moderate NAT error on my 360. I read that it should support UPnP but nobody knows how to configure it. So I go for the next option, port forwarding. However, when I set up a static IP on my laptop I can't connect to the internet at all. I had to change it back. Any ideas on how I can get this? I can send messages to people through my 360, but I want to be able to chat and play games with them, join parties etc.