Game dosen't pause

I am making a pause script and i am using the first person controller. when ever I hit the key I set for pause, the game for some reason doesn't pause. Here is the code :

var paused : boolean = false; function Start () { Screen.showCursor = false; } function Update() { if (Input.GetKeyDown(KeyCode.Escape) && !paused) { Screen.lockCursor = false; Time.timeScale = 0; paused = true; Debug.Log("paused"); } else { Screen.lockCursor = true; Time.timeScale = 1; paused = false; Debug.Log("paused"); } }