Erro in MultiPlayer

Someone help me please. I'm "ending" preparations of the multiplayer, but is giving an error "the connection request (IP) failed.Are you sure can be connect to? " using UnityEngine; using System.Collections;

 public class ServerController : MonoBehaviour {
 
     private bool isLoading = false;
     public bool Menus = true;
     public bool TestaRay = false;
     RaycastHit RayCoord;
     public GUISkin gSkin; //Textura dos Botoes
     Vector3 Cord; //Coord
     public string ipToConnect;
     public int portToConnect;
     public int numberPlayers;
     public GameObject Player;
     
     void Start () { 
         Cord.x = Random.value*500; //Randomizar COORD X
         Cord.y = 600; //Altura do Y
         Cord.z = Random.value*500; //Randomizar COORD Z
 
         ipToConnect = Network.player.ipAddress; 
 
     }
     
     void Update () {
         if (!TestaRay){
 
             if(Physics.Raycast(Cord, -transform.up, out RayCoord)){
                 Cord = RayCoord.point+transform.up*2;
                 TestaRay = true;
         }
         }
     }
 
 
     void StartServer(){ //Começar Server
         if(Network.peerType == NetworkPeerType.Disconnected){
             Debug.Log(Network.InitializeServer(numberPlayers, portToConnect, false));
             OnConnectedToServer();
         }
     }
     
     void ConnectToServer(){ //Entrar Server
         if(Network.peerType == NetworkPeerType.Disconnected){
             Debug.Log(Network.Connect(ipToConnect, portToConnect));
         }
     }
     void OnConnectedToServerUltimoSobrevivente(){ //Spawn Modo Ultimo Sobrevivente
         
     }
     
     void OnConnectedToServer(){ //Spawn Modo Sobrevivencia
         if (TestaRay) Network.Instantiate(Player, Cord, transform.rotation, 0);
 
     }
 
     void OnGUI(){ //Funçoes 
         if(Menus){
         if(gSkin)
             GUI.skin = gSkin;
         if(Network.peerType == NetworkPeerType.Disconnected){
             if(GUI.Button(new Rect(Screen.width/2-100, 20, 200, 30), "Inicializar Servidor")){
                 StartServer();
             }
 
 
             ipToConnect = GUI.TextField(new Rect(Screen.width/2-100, 50, 200, 30), ipToConnect);
             if(GUI.Button(new Rect(Screen.width/2-100, 80, 200, 30), "Conectar ao Servidor")){
                 ConnectToServer();
                 }
             if(GUI.Button(new Rect(Screen.width/2-100, 110, 200, 30), "Menu Principal")){
                 Application.LoadLevel("Menu Inicial");
             }
         }
     }
 }
 }