destroy an editorInstance

Hi,

I have in my application to create aninctance of the eitor, after click on a button, show the editor in a new div, and destroy it after editing. It works fine. I used the sample of ajax.html form the install package as sample. But obviously the sample dosn't work fine. The instance will not be destroyed. the script will build for each click a new Instance of editor.
My proper problem is i have to config the editor, and this works only for the first click. after second click, the editor will be shown in the default configuration.

the original code from the ck-sample:

function createEditor()
{
   if ( editor )
      return;

   var html = document.getElementById( 'editorcontents' ).innerHTML;

   // Create a new editor inside the <div id="editor">
   editor = CKEDITOR.appendTo( 'editor' );
   editor.setData( html );
   editor.config.toolbar = [
    ['Bold', 'Italic', '-', 'NumberedList', 'BulletedList', '-', 'Link', 'Unlink', '-', 'Cut','Copy','Paste','-','Outdent','Indent','Blockquote', '-', 'Subscript','Superscript', '-', 'TextColor'],
    ['UIColor']
   ];

   // This sample may break here if the ckeditor_basic.js is used. In such case, the following code should be used instead:
   /*
   if ( editor.setData )
      editor.setData( html );
   else
   {
      CKEDITOR.on( 'loaded', function()
         {
            editor.setData( html );
         });
   }
   */
}

function removeEditor()
{
   if ( !editor )
      return;

   // Retrieve the editor contents. In an Ajax application, this data would be
   // sent to the server or used in any other way.
   document.getElementById( 'editorcontents' ).innerHTML = editor.getData();
   document.getElementById( 'contents' ).style.display = '';

   // Destroy the editor.
   editor.destroy();
   editor = null;
}

the part "ditor.config.toolbar ... " is done by me.
as i described above, the editor appears at first with the choosen buttons. all following appearances of the editor are in the full (default) version.

i hope you can help me to solve the problem.