When i host a game out of the lobby, I'm pressing "multi-player" then "host game", I then get the options of choosing game name and server (set to 20595 edit), the match set up screen then opens. when my son tries to join, a multiplayer game outside the lobby he gets a dialogue box with my game name, server hostname or IP (that is set at 20595, thinking I might need to change that to my/our IP adress?) then server port 20595.
my son just tried changing the server hostname or IP to my addy, and getting the same message re 20595 port.