First Person Controller Camera doesn't rotate in runtime

 #pragma strict
 
 private var FPS : GameObject;
 
 function Start () {
     
     FPS = GameObject.Find("FPSController");
 
 }
 
 function Update () {
 if (Input.GetMouseButtonDown(0)) {
 
     var buttonName = EventSystems.EventSystem.current.currentSelectedGameObject.name;
     var VP : GameObject = GameObject.Find(buttonName);  // VP = View Point
 
 
 Debug.Log("VP Rotation = " + VP.transform.eulerAngles);
 FPS.transform.localPosition = VP.transform.localPosition;
 FPS.transform.eulerAngles = VP.transform.eulerAngles;
 
 Debug.Log("FPS Rotation = " + FPS.transform.eulerAngles);
 //FPS.transform.localScale = VP.transform.localScale;
 
 
     }
 }

The Above is the code i've written to move camera from one place to another. The position works perfectly.

Even rotation works, but as soon as the camera is rotated, within fraction of secs, it gets reset to 0,0,0;

FPS doesn't even rotate when tried rotating camera through scene window in run-time.

Can anyone help me to achieve this?

Thanks.