Cursor lock/unlock not working

i did a lot of research on this, my script seems fine to me but when i press esc the cursor does not show up as i made it do in the script, it just appears for a split second then goes away...

here's the script:

 //Is the game paused?
 var paused : boolean = false;
 //GameObjects
 var gunCam : GameObject;
 var PauseTextOne : GameObject;
 var PauseTextTwo : GameObject;
 var PauseTextThree : GameObject;
 var PauseTextFour : GameObject;
 
 function Awake()
 {
     PauseTextOne.active = false;
     PauseTextTwo.active = false;
     PauseTextThree.active = false;
     PauseTextFour.active = false;
 }
 
 function Update () 
 {
     if(Input.GetButtonUp("Pause"))
     {
         if(!paused)
         {
             Time.timeScale = 0;
             paused = true;
             GetComponent(MouseLook).enabled = false;
             gunCam.GetComponent(Camera).enabled = false;
             Screen.showCursor = false;
             PauseTextOne.active = true;
             PauseTextTwo.active = true;
             PauseTextThree.active = true;
             PauseTextFour.active = true;
             Screen.lockCursor = false;
             Screen.showCursor = true;
         }
         else
         {
             paused = false;
             Time.timeScale = 1;
             GetComponent(MouseLook).enabled = true;
             gunCam.GetComponent(Camera).enabled = true;
             Screen.showCursor = true;
             PauseTextOne.active = false;
             PauseTextTwo.active = false;
             PauseTextThree.active = false;
             PauseTextFour.active = false;
             Screen.lockCursor = true;
             Screen.showCursor = false;
         }
     }
 }