Connection problem

[1wilco12]

In December I bought Altitude and played it for a while.. Then I stopped playing and reinstalled windows. Now I want to play again, so I installed it again (via steam) but it doesn't work! I get an error "connection problem". My firewall doesn't block altitude and I forwarded my port... Nothing helps... What to do?

Wilco


EDIT: Mhh, weird. Just started the game again. Then it updated, and tells me to restart the game. After the restart it says connection problem.. again..