After installing AOE II (2.0a) it runs fine on Vista RTM. However, when trying to connect to a game hosted on another (XP) machine the multiplayer game on XP can not be found (is not displayed in AOE on the Vista pc). Likewise when creating a multiplayer game on Vista it can be seen from XP but no one can connect to it.
Firewall has been configured to allow AOE II on UDP and TCP.
What else should be done?