Not working gui buttons

I have tried in both Unity 3 and Unity 4, but neither will display the GUI buttons. I am following the remixgames FPS tutorial, for anyone wondering. Thanks.

This is the code:

 using UnityEngine;
 using System.Collections;
 
 public class Menu : MonoBehaviour {
     private string CurMenu;
     public string Name;
 
     void Start () {
         CurMenu = "Main";
     }
 
     void Update () {
     
     }
 
     void ToMenu (string menu) {
         CurMenu = menu;
     }
 
     void OnGUI () {
         if(CurMenu == "Main")
             Main();
         if(CurMenu == "Host")
             Host();
       }
 
       private void Main () {
           if(GUI.Button(new Rect(0,0,128,32),"Host a match")) {
               ToMenu("Host");
           }
           
           Name = GUI.TextField(new Rect(130,0,128,32),Name);
 
           if(GUI.Button(new Rect(260,0,128,32),"Save")) {
               PlayerPrefs.SetString("PlayerName", Name);
           }
       }
 
       private void Host () {
 
       }
 }