[xwiki-users] Problems with PanelWizard (Rico error)

Hi all, i have a problem with the Panel Wizard in Wiki Preferences: After opening it in Internet-Explorer I get: 'Errors on this Page' : Rico is undefined. on this line in the page-sourcecode: <script type="text/javascript">new Rico.Accordion( 'bicwikinav', {panelHeight:'250',onLoadShowTab:'0'} );</script> Although the Panel Wizard is displayed correctly I can't drag&drop the panels to a position. I am using XWiki Enterprise 1.8.3.19546 and I thought that Rico is already replaced by Scriptaculous ? I did try to re-import the pages XWiki.XWikiPreferences and Panels.PanelWizard but with no success. Do you have any ideas what I can do? Thanks in advance Matthias