Facebook integration problem

Hi there, just trying to get my facebook plugin to work… just getting started and already getting errors like “error CS0103: The name `Util’ does not exist in the current context” is there anything im missing. Thanks in advance

using UnityEngine;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using Facebook.MiniJSON;

public class FacebookManager : MonoBehaviour
{

	void Awake()
	{	
		Util.Log("Awake");
		// Initialize FB SDK
		enabled = false;
		FB.Init(SetInit, OnHideUnity);
	}

	private void SetInit()                                                                       
	{                                                                                            
		Util.Log("SetInit");      
		enabled = true; // "enabled" is a property inherited from MonoBehaviour                  
		if (FB.IsLoggedIn)                                                                       
		{                                                                                        
			Util.Log("Already logged in");                                                    
			OnLoggedIn();                                                                        
		}                                                                                        
	}                                                                                            

	private void OnHideUnity(bool isGameShown)                                                   
	{                                                                                            
		Util.Log("OnHideUnity");                                                              
		if (!isGameShown)                                                                        
		{                                                                                        
			// pause the game - we will need to hide                                             
			Time.timeScale = 0;                                                                  
		}                                                                                        
		else                                                                                     
		{                                                                                        
			// start the game back up - we're getting focus again                                
			Time.timeScale = 1;                                                                  
		}                                                                                        
	} 

}

What is Util? Your own class?

The correct statement, judging from context would be

Debug.Log("...");