GUI messed up after build

When I'm in the editor the GUI is okey and works fine after I build I get the main menu and I click on play for example clicking on play should pass me to the hero select screen and close the main menu screen all it does is just showing the hero screen but wont close the main menu then I click back so It should close the hero select and open the mainmenu but it wont he just stays open but in active I think that the picture dont change but by code it wont exist Here is my mainmenu code:

 using UnityEngine;
 using System.Collections;
 
 public class MainMenu : MonoBehaviour
 {
     private bool inMenu;
     private bool heroSelect;
     private bool mpHeroSelect;
     private bool serverSelect;
     private bool optionScreen;
 
     //slots
     public GameObject heroOne;
     public GameObject heroTwo;
     public GameObject heroThree;
 
     public bool heroOneChosen;
     public bool heroTwoChosen;
     public bool heroThreeChosen;
 
     public GameObject spawnPoint;
 
 
     // Use this for initialization
     void Start () 
     {
         inMenu = true;
         spawnPoint = GameObject.FindGameObjectWithTag ("Spawn Point");
     }
 
     void OnGUI()
     {
         if(inMenu)
         {
             DrawMainMenu ();
         }
 
         if(heroSelect)
         {
             DrawHeroSelect ();
         }
 
         if (mpHeroSelect)
         {
             DrawMPHeroSelect ();
         }
 
         if(serverSelect)
         {
             DrawServerSelect ();
         }
 
         if(optionScreen)
         {
 
         }
     }
 
     void DrawMainMenu ()
     {
         if (GUI.Button (new Rect(Screen.width / 2 - 100,Screen.height / 2 - 75, 200, 50), "Play Singleplayer"))
         {
             heroSelect = true;
             inMenu = false;
         }
 
         if (GUI.Button (new Rect(Screen.width / 2 - 100,Screen.height / 2 - 25, 200, 50), "Play Multiplayer"))
         {
             mpHeroSelect = true;
             inMenu = false;
         }
 
         if (GUI.Button (new Rect(Screen.width / 2 - 100,Screen.height / 2 + 25 , 200, 50), "Options"))
         {
 
         }
 
         if (GUI.Button (new Rect(Screen.width / 2 - 100,Screen.height / 2 + 75, 200, 50), "Exit"))
         {
             Application.Quit ();
         }
     }
 
     void DrawHeroSelect ()
     {
         if(GUI.Button(new Rect(Screen.width - 200, Screen.height - 50, 200,50),"Play!"))
         {
             heroSelect = false;
             SpawnPlayer(0);
         }
 
         if(GUI.Button(new Rect(0, Screen.height - 50, 200,50),"Back"))
         {
             heroSelect = false;
             inMenu = true;
         }
 
         //slots
         if(GUI.Button(new Rect(10,10,180,50),heroOne.name))
         {
 
         }
 
         if(GUI.Button(new Rect(10,70,180,50),heroOne.name))
         {
             
         }
 
         if(GUI.Button(new Rect(10,130,180,50),heroOne.name))
         {
             
         }
     }
 
     void DrawMPHeroSelect ()
     {
         if(GUI.Button(new Rect(Screen.width - 200, Screen.height - 50, 200,50),"Play!"))
         {
             serverSelect = true;
             mpHeroSelect = false;
         }
         
         if(GUI.Button(new Rect(0, Screen.height - 50, 200,50),"Back"))
         {
             heroSelect = false;
             inMenu = true;
         }
         
         //slots
         if(GUI.Button(new Rect(10,10,180,50),heroOne.name))
         {
             
         }
         
         if(GUI.Button(new Rect(10,70,180,50),heroOne.name))
         {
             
         }
         
         if(GUI.Button(new Rect(10,130,180,50),heroOne.name))
         {
             
         }
     }
 
     //Server
 
     void DrawServerSelect ()
     {
         if (!Network.isClient && !Network.isServer)
         {
             if (GUI.Button(new Rect(100, 100, 250, 100), "Start Server"))
                 StartServer();
             
             if (GUI.Button(new Rect(100, 250, 250, 100), "Refresh Hosts"))
                 RefreshHostList();
             
             if (hostList != null)
             {
                 for (int i = 0; i < hostList.Length; i++)
                 {
                     if (GUI.Button(new Rect(400, 100 + (110 * i), 300, 100), hostList[i].gameName))
                         JoinServer(hostList[i]);
                 }
             }
         }
     }
 
     private const string typeName = "Rpg";
     private const string gameName = "Sean";
     
     
     private void StartServer()
     {
         Network.InitializeServer(4, 25000, !Network.HavePublicAddress());
         MasterServer.RegisterHost(typeName, gameName);
     }
 
     private HostData[] hostList;
     
     private void RefreshHostList()
     {
         MasterServer.RequestHostList(typeName);
     }
     
     void OnMasterServerEvent(MasterServerEvent msEvent)
     {
         if (msEvent == MasterServerEvent.HostListReceived)
             hostList = MasterServer.PollHostList();
     }
     
     private void JoinServer(HostData hostData)
     {
         Network.Connect(hostData);
     }
     
     public GameObject playerPrefab;
     
     void OnServerInitialized()
     {
         SpawnPlayer(1);
     }
     
     void OnConnectedToServer()
     {
         SpawnPlayer(1);
     }
     
     private void SpawnPlayer(int accses)
     {
         if(accses == 1)
         {
             Network.Instantiate(playerPrefab,spawnPoint.transform.position, Quaternion.identity, 0);
         }
         if(accses == 0)
         {
             Instantiate(playerPrefab, spawnPoint.transform.position, Quaternion.identity);
         }
     }
     //Server end    
 }