Deleted GameObject on Next Scene.

Hello guys i need help about why my all gameobject deleted on next scene.

Scene 0 is a login and if login is done i go to scene 1 and all gameobjects on scene 1 “DELETED”

my connection script:

using UnityEngine;
using System.Collections;

public class Connection : MonoBehaviour
{
    public string username = "";
    public string password= "";
    public string repassword= "";
    public string email= "";
    public string message= "";
    public GUISkin hdskin;
    public int HofBox = 25;

    public int UserID;
    public string loguser= "";

    private string logpass= "";
    private string logmessage= "";
    private string mainDomainName= "http://avct.sytes.net/mmorpg";
    private int generatednumber = 0;
    private int numberinput;

    public bool islogin = true;
    private bool isregister = false;

    public string CurrentMenu = "Menu";

    //Chequea si tiene personaje
    private int existCharacter;
    public bool ExistChar = false;

    void Start()
    {
        DontDestroyOnLoad (gameObject);
    }

    void  OnGUI ()
    {
        if(CurrentMenu == "Menu")
        {
            GUI.skin = hdskin;
            if(islogin == false && isregister == true)
            {
                GUI.Box( new Rect(Screen.width /2-250,20,500,480),"");
                GUI.Label( new Rect(Screen.width /2-100,30,200,50),"Please fill out the fields");
                GUI.Label( new Rect(Screen.width /2-230, 130,200,50),"Username:");
                username = GUI.TextField( new Rect(Screen.width /2-20,130,200,HofBox),username,45);
                GUI.Label( new Rect(Screen.width /2-230,190,200,50),"Password:");
                password = GUI.PasswordField( new Rect(Screen.width /2-20,190,200,HofBox),password,"*"[0],45);
                GUI.Label( new Rect(Screen.width /2-230,250,200,50),"Re-Enter pass:");
                repassword = GUI.PasswordField( new Rect(Screen.width /2-20,250,200,HofBox),repassword,"*"[0],45);
                GUI.Label( new Rect(Screen.width /2-230,310,200,50),"Email:");
                email = GUI.TextField( new Rect(Screen.width /2-20,310,200,HofBox),email,45);
                GUI.Label( new Rect(Screen.width /2-230,360,150,50),"Please verify:");
                GUI.Label( new Rect(Screen.width /2-80,360,100,HofBox),generatednumber.ToString());
                numberinput = int.Parse(GUI.TextField( new Rect(Screen.width /2+80,360,100,HofBox),numberinput.ToString()));
                if(GUI.Button( new Rect(Screen.width /2-230,420,200,HofBox),"Register!"))
                {
                    message = "";   
                    if(username == "" || email == "" || password == "" || numberinput == 0){
                        message += "Please fill in the empty fields. \n";
                    }else{
                        if(password == repassword){
                            if(numberinput == generatednumber){
                                StartCoroutine("doRegister");
                            }else{
                                message += "The number you inputed is not the same number.";
                            }
                           
                        }else{
                            message += "The passwords do not match. \n";
                        }
                    }   
                }
                if(GUI.Button( new Rect(Screen.width /2-20,420,200,HofBox),"Return to login"))
                {
                    islogin = true;
                    isregister = false;
                    username = ""; //cleaning our variables
                    password = "";
                    repassword = "";
                    email = "";
                    numberinput = 0;
                    message = "";
                    loguser = "";
                    logpass = "";
                    logmessage = "";
                }
                if(message != "")
                {
                    GUI.Label( new Rect(Screen.width /2-230,460,460,50), message);
                }}
            else if(islogin == true && isregister == false)
            {
                StartCoroutine (ServerRefresh ());

                GUI.Box( new Rect(Screen.width /2-250,20,500,450),"");
                               
                if(MasterServer.PollHostList().Length != 0)
                {
                    HostData[] data = MasterServer.PollHostList();
                    foreach(HostData c in data)
                    {
                        GUILayout.BeginArea(new Rect(Screen.width /2-65,30,200,50));
                        GUILayout.Label(c.gameName + " " + (c.connectedPlayers - 1) + "/" + c.playerLimit);
                        GUILayout.EndArea();
                    }
                }
                else
                {
                    GUILayout.BeginArea(new Rect(Screen.width /2-65,30,200,50));
                    GUILayout.Label("Server Offline");
                    GUILayout.EndArea();
                }

                GUI.Label( new Rect(Screen.width /2-230, 130,200,50),"Username:");
                loguser = GUI.TextField( new Rect(Screen.width /2-20,130,200,HofBox),loguser,45);
                GUI.Label( new Rect(Screen.width /2-230,230,200,50),"Password:");
                logpass = GUI.PasswordField( new Rect(Screen.width /2-20,230,200,HofBox),logpass,"*"[0],45);
                if(GUI.Button( new Rect(Screen.width /2-230,330,200,HofBox),"Login")){
                    if(loguser == "" || logpass == ""){
                        logmessage += "Please enter the necessary data! \n";
                    } else{
                        logmessage = "";
                        StartCoroutine("doLogin");
                    }
                }
                if(GUI.Button( new Rect(Screen.width /2-20,330,200,HofBox),"Register"))
                {
                    islogin = false;
                    isregister = true;
                    generatednumber=Random.Range(1000,99999);
                    username = ""; //cleaning our variables
                    password = "";
                    repassword = "";
                    email = "";
                    numberinput = 0;
                    message = "";
                    loguser = "";
                    logpass = "";
                    logmessage = "";
                }
                if(logmessage != "")
                {
                        GUI.Label( new Rect(Screen.width /2-230,360,460,50),logmessage);
                }
            }
        }//CurrentMenu = Menu

        if(CurrentMenu == "Logged")
        {
            islogin = true;
            isregister = false;

            StartCoroutine("CharacterCheck", 2.0F);
        }//CurrentMenu = Logged

        if (CurrentMenu == "Character")
        {
            if(ExistChar == true)//Si Tiene Personaje
            {
                Application.LoadLevel (1);


                islogin = false;
            }
            if(ExistChar == false)//No Tiene Personaje
            {
                Application.LoadLevel (1);
                islogin = false;
            }
        }//CurrentMenu = Character
    }//OnGui

    public void OnConnectedToServer()
    {
        CurrentMenu = "Logged";
    }
   
    private void OnDisconnectedFromServer()
    {
        CurrentMenu = "Menu";
    }

    private IEnumerator doRegister()
    {
        WWWForm form = new WWWForm();
        form.AddField("Username" , username);
        form.AddField("Password" , password);
        form.AddField("Email" , email);           
        var w = new WWW(mainDomainName + "/Register.php", form);           
        yield return w;
        if(w.error == null){
            message += w.text;
            StopCoroutine("doRegister");
        }else{
            message += "Error : " + w.error + "\n";
        }
    }
    private IEnumerator doLogin()
    {
        WWWForm logform = new WWWForm();
        logform.AddField("Username" , loguser);
        logform.AddField("Password" , logpass);
        var logw = new WWW(mainDomainName + "/Login.php", logform);
        yield return logw;
        if(logw.error == null){
            logmessage += logw.text;
            StopCoroutine("doLogin");
        }else{
            logmessage +="Error : " + logw.error + "\n";   
        }
        if(logmessage == "Login success! Please wait while the game loads..."){
            Network.Connect("avct.sytes.net", 8632);
        }
    }

    private IEnumerator CharacterCheck()
    {
        WWWForm userInfoForm = new WWWForm();
        userInfoForm.AddField("Username" , loguser);
        var logw = new WWW(mainDomainName + "/CharacterCheck.php", userInfoForm);
        yield return logw;
        if(logw.error == null){
           
            string[] data = logw.text.Split(new string[] {","}, System.StringSplitOptions.None);
            UserID = System.Convert.ToInt32(data[0]);
            existCharacter = System.Convert.ToInt32(data[1]);

            yield return new WaitForSeconds(4);

            if(existCharacter == 1)//Si Tiene Personaje
            {
                ExistChar = true;

                CurrentMenu = "Character";
            }
            if(existCharacter == 0)//No Tiene Personaje
            {
                ExistChar = false;

                CurrentMenu = "Character";
            }

        }else{
            message +="Error : " + logw.error + "\n";
        }
    }

    private IEnumerator ServerRefresh()
    {
        yield return new WaitForSeconds(3);
        MasterServer.RequestHostList("MMOFPS");
    }
}

If you open your ‘scene 1’ in the editor is there anything in it?