Ok I've fixed it using the system files ( and file editor ) sent to me by DjSetakos2011 :)
Now I've another problem: when I try to select a server from the server list, and I click "Ok" , nothing happened ... Why ? :-\
EDIT: Fixed opening port 7777 on my router.
Now Another problem: my game (client) revision is higger than the one in gameserver, and when I try to enter the world tha server kick my client ( for unknown packets )... what can I do ?