Ckeditor 3.6.3 events

I have a page - editor.htm - which defines the editor rather like this (unimportant details snipped). I have a config.js in the same folder which defines my stuff; it's loading properly.My c# app loads a document on disk and sets its data into the editor using setData() after the EditorReady event fires. This is running inside a C# winforms app and loading files from C: to edit; but it's an IE instance window inside the app which hosts the editor.

         <textarea cols="80" id="htmlEditor" name="htmlEditor" rows="10" ></textarea>
         <script type="text/javascript">

             CKEDITOR.replace('htmlEditor', {});

             CKEDITOR.on('instanceReady', function (ev) {
                 var editor = ev.editor;
                 editor.execCommand('maximize');
                 if (window.external.EditorReady) {
                     // notify editor is ready in winForms application
                     window.external.EditorReady();
                 }
             });

             CKEDITOR.on('configLoaded', function (ev) {
                alert("configLoaded");
             });

             CKEDITOR.on('configLoaded', function (ev) {
                alert("configLoaded");
             });

             CKEDITOR.on('setData', function (ev) {
                alert("setData");
             });

         </script>