Tired of getting this error message, finding that your connection to getting into muliplayer games is about 30% of the time at best?!?
Well I found the solution here, after all of this I finally am able to connect to any game first try on any map with any number of people.
Just trying to help, cause I know how frustrating this is.
So it's all about Port Forwarding.
First is the best port forwarding site, has all the routers so check it outhttp://portforward.com/english/routers/por...routerindex.htm
Next and sorry for anyone without a D-link I found what to do step by step to open it all up, Im hoping that even though you may not have a D-link that this will point you in the right direction.
And be sure to give your Xbox 360 a Static ISP also found on the same link above.
Hope this helps, pass this around and put it in another area if it doesn't belong here.