void OnConnectedToServer() is not call

Here my server script

 using UnityEngine;
 using System.Collections;
 
 public class CreateServer : MonoBehaviour {
     public string connectToIp = "127.0.0.1";
     public int connectPort = 25001;
 
     // Use this for initialization
     void Start () {
 
     }
     
     // Update is called once per frame
     void Update () {
     
     }
     void OnGUI(){
         if (Network.peerType == NetworkPeerType.Disconnected) {
             //Ko ket noi , ko la client hay host
             GUILayout.Label ("Connection status : Disconnected");
             //Tao 2 o connect to ip va connect port
             connectToIp = GUILayout.TextField (connectToIp, GUILayout.MinWidth (100));
             connectPort = int.Parse(GUILayout.TextField(connectPort.ToString()));
             //Button connect
             GUILayout.BeginVertical ();
             if (GUILayout.Button ("Start Server")) {
                     //Tao 1 server voi 32 clients su dung port thong qua GUI dien o tren
                     Network.InitializeServer (32, connectPort);
             }
             GUILayout.EndVertical ();
         } else {
             //Neu co connection
             if (Network.peerType == NetworkPeerType.Connecting) {
                 //Thong bao hien thi dang ket noi
                 GUILayout.Label ("Connection status: Connecting");
             }else if (Network.peerType == NetworkPeerType.Server) {
                 //Thong bao hien thi da ket noi
                 GUILayout.Label ("Connection status: Server!");
                 //So luong connection
                 GUILayout.Label ("Connections: " + Network.connections.Length);
                 if (Network.connections.Length >= 1) {
                     //Ping so voi player dau tien
                     GUILayout.Label ("Ping to first player: " + Network.GetAveragePing (Network.connections [0]));
                 }            
             }
             //Tao nut disconnect server
             if (GUILayout.Button ("Disconnect")) {
                 Network.Disconnect (200);
             }
         }
     }
     // NONE of the functions below is of any use in this demo, the code below is only used for demonstration.
     // First ensure you understand the code in the OnGUI() function above.
     
     //Client functions called by Unity
     void OnConnectedToServer() {
         Debug.Log("This CLIENT has connected to a server");    
     }
     
     void OnDisconnectedFromServer(NetworkDisconnection info) {
         Debug.Log("This SERVER OR CLIENT has disconnected from a server");
     }
     
     void OnFailedToConnect(NetworkConnectionError error){
         Debug.Log("Could not connect to server: "+ error.ToString());
     }
     
     
     //Server functions called by Unity
     void OnPlayerConnected(NetworkPlayer player) {
         Debug.Log("Player connected from: " + player.ipAddress +":" + player.port);
     }
     
     void OnServerInitialized() {
         Debug.Log("Server initialized and ready");
     }
     
     void OnPlayerDisconnected(NetworkPlayer player) {
         Debug.Log("Player disconnected from: " + player.ipAddress+":" + player.port);
     }
     
     
     // OTHERS:
     // To have a full overview of all network functions called by unity
     // the next four have been added here too, but they can be ignored for now
     
     void OnFailedToConnectToMasterServer(NetworkConnectionError info){
         Debug.Log("Could not connect to master server: "+ info);
     }
     
     void OnNetworkInstantiate (NetworkMessageInfo info) {
         Debug.Log("New object instantiated by " + info.sender);
     }
     
     void OnSerializeNetworkView(BitStream stream,NetworkMessageInfo info)
     {
         //Custom code here (your code!)
     }
     
     /* 
      The last networking functions that unity calls are the RPC functions.
      As we've added "OnSerializeNetworkView", you can't forget the RPC functions 
      that unity calls..however; those are up to you to implement.
      
      @RPC
      function MyRPCKillMessage(){
         //Looks like I have been killed!
         //Someone send an RPC resulting in this function call
      }
     */
 }

And here is my clients script

 using UnityEngine;
 using System.Collections;
 
 public class ConnectToServer : MonoBehaviour {
     public string connectToIP = "127.0.0.1";
     public int connectPort = 25001;
 
     // Use this for initialization
     void Start () {
         //Application.runInBackground = true;
     }
     
     // Update is called once per frame
     void Update () {
     
     }
 
     void OnGUI () {
         if (Network.peerType == NetworkPeerType.Disconnected) {
             //We are currently disconnected: Not a client or host
             GUILayout.Label ("Connection status: Disconnected");
 
             connectToIP = GUILayout.TextField (connectToIP, GUILayout.MinWidth (100));
             connectPort = int.Parse(GUILayout.TextField (connectPort.ToString ()));
             
             GUILayout.BeginVertical ();
             if (GUILayout.Button ("Connect as client")) {
                 //Connect to the "connectToIP" and "connectPort" as entered via the GUI
                 //Ignore the NAT for now
                 Network.Connect (connectToIP, connectPort);
             }
             GUILayout.EndVertical ();
         } else {
             //We've got a connection(s)!
             if (Network.peerType == NetworkPeerType.Connecting) {
                 GUILayout.Label ("Connection status: Connecting");
             } else if (Network.peerType == NetworkPeerType.Client) {
                 GUILayout.Label ("Connection status: Client!");
                 GUILayout.Label ("Ping to server: " + Network.GetAveragePing (Network.connections [0]));
 
                 Application.LoadLevel("BeginBattle");
             }            
             if (GUILayout.Button ("Disconnect")) {
                 Network.Disconnect (200);
             }
         }
     }
 }

And here is my spawn player scripts

 using UnityEngine;
 using System.Collections;
 
 public class SpawnPlayer : MonoBehaviour {
     public Transform playerPrefab ;
 
     // Use this for initialization
     void Start () {
         //Spawnplayer();
         //Application.runInBackground = true;
     }
     
     // Update is called once per frame
     void Update () {
     
     }
 
     void OnConnectedToServer (){
         Debug.Log ("OnConnectedToServer");
         Spawnplayer();
     }
 
     void OnServerInitialized (){
         Debug.Log ("OnServerInitialized");
         Spawnplayer();
     }
 
     void Spawnplayer(){
         //Spawn khi co mang
         Network.Instantiate(playerPrefab, transform.position, transform.rotation, 0);
         //Spawn khi ko co mang
         //Instantiate (playerPrefab, transform.position, transform.rotation);
     }
 
     void OnPlayerDisconnected(NetworkPlayer player) {
         Debug.Log("Clean up after player " + player);
         Network.RemoveRPCs(player);
         Network.DestroyPlayerObjects(player);
     }
     
     void OnDisconnectedFromServer(NetworkDisconnection info) {
         Debug.Log("Clean up a bit after server quit");
         Network.RemoveRPCs(Network.player);
         Network.DestroyPlayerObjects(Network.player);
         
         /* 
     * Note that we only remove our own objects, but we cannot remove the other players 
     * objects since we don't know what they are; we didn't keep track of them. 
     * In a game you would usually reload the level or load the main menu level anyway ;).
     * 
     * In fact, we could use "Application.LoadLevel(Application.loadedLevel);" here instead to reset the scene.
     */
         Application.LoadLevel(Application.loadedLevel);
     }
 }
 

My problem is my void OnConnectedToServer() in SpawnPlayer.cs is not running , i think i was connect success because line

 Application.LoadLevel("BeginBattle");

pass , and i connect to the server , then why my void OnConnectedToServer() not running , pls help :D