GUI.Label appearing behind GUI.Button

Hi all,

Trying to display a cooldown timer over the top of a spell button. No matter what I try, I seem to be unable to get the GUI.label infront of the GUI.button. GUI.depth does not work, as it is all processed in the same GUI Script.

Any ideas, references or something I am missing would be a great help

Excerpt of code from ONGUI function

 //Omitted Code
 
 function OnGUI ()
 {    
         for(var i : int = 0; i < spellIcon.Length; i++)
         {
             if (GUI.Button (new Rect(Screen.width/2-400,Screen.height-100,64,64),spellIcon[i]))
             {
                 if (cooldownTimer[i] <= 0)
                 {
                     cameraAimingScriptGO.gameObject.GetComponent(AimingRay).CastSpell();
                     cooldownTimer[i] = cooldownSpellTime[i];
                 }
             }
             GUI.Label (new Rect(Screen.width/2-400+50,Screen.height-100+40,64,64),"1");
             
             //Cooldown Component
             if (cooldownTimer[i]>0)
             {
                 GUI.Label (new Rect(Screen.width/2-400,Screen.height-100,64,64),cooldownCover);
                 GUI.skin = guiCountdown;
                 GUI.Label (new Rect(Screen.width/2-380,Screen.height-68,64,64),""+cooldownTimer[i]);
             }
         }
 }
 
 //Omitted Code