treepanel - Extjs4 treenodes click error -

I am working in extjs4. I have made Treeview as -

  Ext.define ('Balaee.view.qb.qbquestion.tree1', 'extend:' Ext.tree.Panel ', title:' Simple Tree ',' Width: 200, id: 'tree 1', height: 150, alias: 'widget.tree1', store: 'qb.qbquestionStore', displayField: 'text', rootVisible: true, multiSelect: true, valueField: 'Id' RenderTo: Ext.getBody (),},   
 Sends Jason through the server up right connected to the paperpanel but whreen I try to click on treenodes This is giving me an error as "TypeError: listener.fireFn is undefined" Mozilla Fire "Uncaught TypeError: Method Can not Call Calls" and "Undefined" Nodes are expanded once only to the itemclick in the controller, I've written the code - " 
  init: function () {this.control ({'tree1': {itemclick: {fn: function (view, record, item, index, e) {if (record.data.checked == true) { Console.log (record.data.id)}}}},   
 So what should I do to delete the error?   
 
 
  'tree 1'  is an incorrect selector.  this.control ({'#'} hashtag  # :  Tree1 ': {  
 UPDATE  
 line me Misses  alias: 'widget.tree1' . That's why your selector was right.  
 Try changing the listener:  
  'tree1': {itemclick: function (see, record, item, index , E) {if (record.data.checked == true} {console.log (record.data.id);}}   
 I believe that in your code The listener's format is not supported Ted.