Reconnect & Resyncronize to VASSAL Server

Hi there, yerstday i was having fun playing at World Of Worcraft: The Boardgame with some friend of mine. After a while i got disconnected from the VASSAL server. That normal for me, my internet connection is more then orrible…Anyway, i reconnected to the server and joined again the room where we were playing. Then in the room i saw twice my nickname, so i triend to resync right clicking on one of my nicknames and chosing Sync but the game just closed and nothing happened.
Someone can explain how to reconnect and resync in the right way? Tnx a lot.