I i'm having trouble with playing multiplayer via LAN. Me and my friend are beeing kicked from the server after the message "[player name] has connected". We also fall into to the world (so it looks like world is not beeing fully loaded).

Multiplayer works fine becasue we can succesfuly connect to other open servers. We use hamachi, so it should be much easier without need of port-forwarding. I tried reinstalling hamachi and Minecraft but it doesnt work. We checked diffrent versions of Minecraft, but without any good result. We have also excluded all the java apllications and Minecraft from firewall. 

Do you have any idea what else should I try?