[Unity 4.6] UI Button problem null reference exception [Js]

So i got a few problems with this code. The function gets called when i press the "Refresh Hosts" button. If it finds a host the function gets called. Wich works fine.

But I got some problems accessing the buttons that gets created in runtime. I get a NullReferenceException when I try to define some variables in the components of the instantiated button.

Help would be greatly appreciated. :D

 function UIHostDataButtons(){
     
     
     if(hostData){
     for(var i:int=0; i<hostData.Length; i++){
         var button = new GameObject("button", CanvasRenderer, Image, Button);
         var buttonScript = button.GetComponent(Button);
         
         Debug.Log("Chupset");
            button.transform.SetParent(canvas.transform, false);
            
            button.id = "Game" + i;
            button.RectTransform.sizeDelta = Vector2(200, 30);
            button.GetComponentInChildren(Text).text = hostData[i].gameName;
            
            button.RectTransform.posX= 0;
            button.RectTransform.posY= 50 / i;
            
            button.buttonScript.onClick.AddListener( function() {connectToHost(i);} );
            
     }
     }
 }