I try to make a server for me and my friends to play. But my server is invisible to others. I wait for the others to come but they dont find it in the list. They tried join specific game but this is not workin either. I disable the firewall the problem remains so firewall is not the problem. I also did the port forwarding as described in the http://portforward.com but I am not sure I did it correctly
My router is Fritz!box fon. Help!!!!

If it's invisible then the problem is port forwarding, make sure you forward both TCP and UDP packets on the right port number.

Router setup screens are wide and varied so it's impossible to say click here and click there. I'll show you what mine looks like correctly setup and hope that helps: