The version of CKEditor could not be detected.

Installed ckeditor version 4.1 on drupal 7 in directory sites/all/libraries/ckeditor but I get this message on the configuration overlay. This is a new installation of Drupal. Also when I go to http://www.readwlm.org/sites/all/libraries/ckeditor/samples/index.html as described in the documentation for checking the install the sample files show without any problem. Any help would be greatly appreciated.