Error in the script

My server script, is giving error. Please explain step by step, because I am new here.

I'm Brazilian

 #pragma strict
 var Ip : String = "127.0.0.1";
 var Porta : String = "25000";
 var MaxPlayer : String = "2";
 var Senha : String;
 
 var Player : GameObject;
 function Start () {
 
 }
 
 function OnGUI () {
     GUILayout.BeginArea(Rect(Screen.width / 2 - 150,Screen.height / 2 - 200,300,400));
     if(Network.peerType == NetworkPeerType.Disconnected){
         GUILayout.Label("IP :");
         Ip = GUILayout.TextField(Ip);
         GUILayout.Label("Porta :");
         Porta = GUILayout.TextField(Porta);
         GUILayout.Label("Max Players :");
         MaxPlayer = GUILayout.TextField(MaxPlayer);
         GUILayout.Label("Senha :");
         Senha = GUILayout.TextField(Senha);
         if(GUILayout.Button("Criar Server")){
             Criar(int.Parse(Porta),int.Parse(MaxPlayer),Senha);
         }
         if(GUILayout.Button("Conectar Server")){
             Connect(Ip,int.Parse(Porta),Senha);
         }    
     }
     GUILayout.EndArea();
 }
 
 function Criar(port : int,max : int,senha : String){
     Network.incomingPassword = senha;
     Network.InitializeServer(max,port,false);
     OnConnectedToServer();
 }
 
 function Connect(ip : String,port : int,senha : String){
     Network.Connect(ip,port,senha);
 }
 
 function OnConnectedToServer(){
     Network.Instantiate(Player,Vector3.zero + Vector3(Random.Range(-2,2),0,0),Quaternion.identity,0);
 }
 function OnPlayerDisconnected(player : NetworkPlayer){
     Network.DestroyPlayerObjects(player);
     Network.RemoveRPCs(player);
 }

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