Script Not workin

I have a pause menuscript and i get this error PAUSE MENU.js(8,1): BCE0044: expecting }, found 'private'. Here's the script

 var mainMenuSceneName : String;
 var pauseMenuFont : Font;
 private var pauseEnabled = false;   
 
 function Start(){
 var mainMenuSceneName : String;
 var pauseMenuFont : Font;
 private var pauseEnabled = false;   
 
 function Start(){
  pauseEnabled = false;
  Time.timeScale = 1;
  AudioListener.volume = 1;
  Screen.showCursor = false;
 }
 
 function Update(){
 
  //check if pause button (escape key) is pressed
  if(Input.GetKeyDown("escape")){
  
  
   //check if game is already paused  
   if(pauseEnabled == true){
    //unpause the game
    pauseEnabled = false;
    Time.timeScale = 1;
    AudioListener.volume = 1;
    Screen.showCursor = false;
    GameObject.Find("player").GetComponent(MouseLook).enabled = true;
    GameObject.Find("Main Camera").GetComponent(MouseLook).enabled = true;
 
   }
   
   //else if game isn't paused, then pause it
   else if(pauseEnabled == false){
    pauseEnabled = true;
    AudioListener.volume = 0;
    Time.timeScale = 0;
    Screen.showCursor = true;
    GameObject.Find("player").GetComponent(MouseLook).enabled = false;
    GameObject.Find("Main Camera").GetComponent(MouseLook).enabled = false;
    
    
    
   }
  }
 }
 
 
 private var showGraphicsDropDown = false;
 
 function OnGUI(){
 
 GUI.skin.box.font = pauseMenuFont;
 GUI.skin.button.font = pauseMenuFont;
 
  if(pauseEnabled == true){
   
   //Make a background box
   GUI.Box(Rect(Screen.width /2 - 100,Screen.height /2 - 100,250,200), "Pause Menu");
   
   //Make Main Menu button
   if(GUI.Button(Rect(Screen.width /2 - 100,Screen.height /2 - 50,250,50), "Main Menu")){
    Application.LoadLevel();
   }
   
   //Make Change Graphics Quality button
    if(GUI.Button(Rect(Screen.width /2 - 100,Screen.height /2 ,250,50), "Change Graphics Quality")){
    
    if(showGraphicsDropDown == false){
     showGraphicsDropDown = true;
    }
    else{
     showGraphicsDropDown = false;
    }
   }
   
   //Create the Graphics settings buttons, these won't show automatically, they will be called when
   //the user clicks on the "Change Graphics Quality" Button, and then dissapear when they click
   //on it again....
   if(showGraphicsDropDown == true){
    if(GUI.Button(Rect(Screen.width /2 + 150,Screen.height /2 ,250,50), "Fastest")){
     QualitySettings.currentLevel = QualityLevel.Fastest;
    }
    if(GUI.Button(Rect(Screen.width /2 + 150,Screen.height /2 + 50,250,50), "Fast")){
     QualitySettings.currentLevel = QualityLevel.Fast;
    }
    if(GUI.Button(Rect(Screen.width /2 + 150,Screen.height /2 + 100,250,50), "Simple")){
     QualitySettings.currentLevel = QualityLevel.Simple;
    }
    if(GUI.Button(Rect(Screen.width /2 + 150,Screen.height /2 + 150,250,50), "Good")){
     QualitySettings.currentLevel = QualityLevel.Good;
    }
    if(GUI.Button(Rect(Screen.width /2 + 150,Screen.height /2 + 200,250,50), "Beautiful")){
     QualitySettings.currentLevel = QualityLevel.Beautiful;
    }
    if(GUI.Button(Rect(Screen.width /2 + 150,Screen.height /2 + 250,250,50), "Fantastic")){
     QualitySettings.currentLevel = QualityLevel.Fantastic;
    }
    
    if(Input.GetKeyDown("escape")){
     showGraphicsDropDown = false;
    }
   }
   
   //Make quit game button
   if (GUI.Button (Rect (Screen.width /2 - 100,Screen.height /2 + 50,250,50), "Quit Game")){
    Application.Quit();
   }
  }
 }