Problem with Unity Network syncrhonization

Hi, I am doing a small card game online with the network tool from unity; I already did the connexion of the 2 players in the game, but when I try to change something (like draw) in the scene, it make the change for only one of the screens, how can i make this change for the 2 connected players? I saw something about Network View, but it still doesn't work. Help me please.