Problem in making multiplayer game

I am working on a multiplayer game,everything is working fine in my project except whenever I create 3 copies of game one for server and other two for opposing player, every time I have to click on the server copy of the game to update all the data, even when a player’s copy connect to the server then I have to click on the server to receive that request.I have attached my multiplayer script.[20289-multiplayerscripttext.txt|20289]

void Start() {
Application.runInBackground = true;
}