setData() error

Hi all,

I'm trying to use the setData function like this:

CKEDITOR.instances["Mens"].setData('test');

or

CKEDITOR.instances["Mens"].setData('test', function()
      {
        CKEDITOR.instances["Mens"].resetDirty();  
      });

It sets the data but always give me the error:

Message: 's.getSelection()' is null or not an object
Line: 40
Char: 223
Code: 0
URI: http://localhost:24662/Scripts/ckeeditor/ckeditor.js


any ideas??

Tks.