Cannot connect server

Sending heartbeat to master server [IP:``.``.``.``:`````]
Received info request from a master server [IP:``.``.``.``:`````].

server is heartbeat very well

$ServerInfo::Address = "IP:``.``.``.``:`````";

%conn = new GameConnection(ServerConnection);
%conn.connect($ServerInfo::Address);

but i cant connect this server when other computer connect this server because ConnectRequestTimedout..

how can i do it?..