NGUI countdown in label

Hello again, Im trying to get a countdown C# script to appear at each second (preferably with miliseconds too) inside of an NGUI label. my label is named CountDown and here is the code i have so far (i havent even tried to implement miliseconds yet, im just doing seconds and minutes till i can get it figured out)

 using UnityEngine;
 using System.Collections;
 
 public class Countdown : MonoBehaviour {
     
     UILabel c = GameObject.Find("CountDown").GetComponent<UILabel>();
     public float Seconds = 30;
     public float Minutes = 2;
     string textTime = "";
     
     // Update is called once per frame
     void Update () {
         if(Seconds <= 0)
         {
             Seconds = 59;
             if(Minutes >= 1)
             {
                 Minutes = (Minutes - 1);
             }
             else
             {
                 Minutes = 0;
                 Seconds = 0;
             }
         }
         else
         {
             Seconds -= Time.deltaTime;
         }
         textTime = Minutes + " : " + Seconds + " : ";
         c.text = textTime;
     }
 }

the NGUI label is pretty much just remaining completely blank though. im sure what im doing wrong is small and inane but i cant seem to put my finger on it. does anyone have any ideas?