Multiplayer help

[Caranfin]

Can anyone tell me how to play some coop games with a friend? We just gave up after what seems like ages of trying to get into the same game.

When I joined my friend's server, we could chat to each other but saw nothing like a player list or anything other than the chat to confirm we were on the same server. He had a button marked "fly", but I didn't. When he pressed the button, he went to the game and I was left sitting in this weird purgatory, not being able to do anything but tweak my plane or leave.

Things we tried:

• Made sure the right ports were forwarded
• Tested with both direct connect and connecting through server list
• Tried starting the battle (host pressed "fly") before the client connected

I'm stumped. The only thing I can think of is maybe we chose a mission that can't be played in multiplayer, but then how do I find a mission we can play? Did we screw something up making the server?