I played for a long time on a minecraft hamachi server with my friends... It worked very well and we wanted to try again... Only I had deleted all the settings of the previous server, so I created another one. The server lets my friends in but doesn't load their world. They only see the sky and cannot move. After a few seconds the server ejects them. I tried playing with two PCs connected to the same Wi-Fi network and it works great. Why doesn't it work with two PCs connected to two different networks?