--- a/hierarchical_select.js	2014-04-12 20:15:38.218050881 +0300
+++ b/hierarchical_select.js	2014-04-12 20:15:52.202050467 +0300
@@ -252,7 +252,7 @@
 
 Drupal.HierarchicalSelect.attachBindings = function(hsid) {
   var updateOpString = $('#hierarchical-select-'+ hsid +'-wrapper .update-button').val();
-  var addOpString = $('#hierarchical-select-'+ hsid +'-wrapper .hierarchical-select input', Drupal.HierarchicalSelect.context).val();
+  var addOpString = $('#hierarchical-select-'+ hsid +'-wrapper .hierarchical-select .add-to-dropbox', Drupal.HierarchicalSelect.context).val();
   var createNewItemOpString = $('#hierarchical-select-'+ hsid +'-wrapper .hierarchical-select .create-new-item-create', Drupal.HierarchicalSelect.context).val();
   var cancelNewItemOpString = $('#hierarchical-select-'+ hsid +'-wrapper .hierarchical-select .create-new-item-cancel', Drupal.HierarchicalSelect.context).val();