Server closed

We got kicked out of the server, and now it wont open again on the same map, we can change map and play, but we would like to play on the current wolrd called firkant, but when ever we try to connect to the map, it says server closed, after a grey screen. 

If i then download the map, the game crashes, and tell us that and unexpected error happend, what can we do to open the map again