[Tutorial] How to play multiplayer using Tunngle

[bluewind95]

Hello. I followed this guide, but I can't get the game to connect to someone else. Ad-hoc server shows them getting online. I get a blank player in the waiting list. They can't see any room to join. The game is Fullmetal Alchemist: Brotherhood. What can I check? Both of us have a green smiley after port-forwarding Tunngle. We're in the same network (a private one). The host Tunngle IP is the one in our settings. We unchecked all the relevant settings.

Help is very much appreciated.