C# void FixedUpdate() only updating once

Hi guys, I have here a very simple 2D object that has a script which only updates once:

 using UnityEngine;
 using System.Collections;
 
 public class EnemyScript : MonoBehaviour {
 
     public GameObject player;
 
     // Update is called once per frame
     void FixedUpdate () {
             Debug.Log ("Log it ");
     }
 }