The name 'MouseLook' does not denote a valid type ('not found')

So I am making a pause menu but when I have should make so the mouse don't move, I get this error. "The name 'MouseLook' does not denote a valid type ('not found'). I have been looking all over Unity answers and I haven't been able to fix it. I have also found that I should put it in in "Standard Assets/Pro Assets/Plugins, but the problem is that I am using a "none pro" version of Unity. I tried to make a new folder called Plugins but that didn't work.

My Code: var Menu : String; var shootScript : PrefabShooting; var lockMouse : MouseLOCK; var lookMouse : MouseLook;

 static var isPaused = false;
 
 //What happends on awake
 function Start () 
 {
     shootScript = GameObject.Find("PlayerCamera").GetComponent(PrefabShooting);
     lookMouse = GameObject.Find("PlayerCamera").GetComponent(MouseLook);
 }
 
 //What happends on a update
 function Update ()
 {
     if(Input.GetButtonDown("Pause") && isPaused == false) {
         
         isPaused = true;
         Time.timeScale = 0;
         shootScript.enabled = false;
         lockMouse.enabled = false;
     }
 }
 
 //Creates buttons and make them click
 function OnGUI ()
 {
     if (isPaused == true)
     {
         if (GUI.Button(Rect(Screen.width*0.5-50, 200-20, 100, 40), "Resum"))
         {
             isPaused = false;
             Time.timeScale = 1;
             shootScript.enabled = true;
             lockMouse.enabled = true;
         }
         
         if (GUI.Button(Rect(Screen.width*0.5-50, 240, 100, 40), "Menu"))
         {
             isPaused = false;
             Time.timeScale = 1;
             shootScript.enabled = true;
             lockMouse.enabled = true;
             Application.LoadLevel(Menu);
         }
     }
 }