voilaAOM uses UDP port 2300 by default for in game network traffic. This error means that AOM is unable to send data to your computer over this port. AOM attempts to detect whether you have a NAT or firewall active and open and automatically configure it but if you receive this error that process is not working with your hardware. To solve this problem, first try updating the firmware on your router device, or using windowsupdate if you are running Internet Connection Sharing. If you still have difficulty connecting, please manually configure your NAT or router to map UDP port 2300 to the client machine that is playing AOM, or please place your machine on the DMZ.
You can also use a different port by adding this to the command line/shortcut for the game: hostPort=XXXX
Where XXXX is the port you want the game to use for all its in-game traffic