AjaxLazyLoadPanel

[Chris]

Hi all,

I am following the example from 
http://www.mkyong.com/wicket/how-do-use-ajaxlazyloadpanel-in-wicket/ but get 
following error:

Last cause: Cannot replace a component which has not been added: id='pList', 
component=[PListPanel [Component id = pList]]:
[AjaxLazyLoadPanel [Component id = pList]]

By the way, is the checking for JavaEnabled valid or still needed? I have 
JavaScript enabled but the method #isJavaEnabled returns false;

WebClientInfo clientInfo = WebSession.get().getClientInfo();
if (clientInfo.getProperties().isJavaEnabled()) {
        add(new AjaxLazyLoadPanel("pList", pModel) {
                @Override
                public Component getLazyLoadComponent(String id) {
                        return new PListPanel("pList", pModel);
        }
    }).setOutputMarkupId(true);
} else {
        add(new PListPanel("pList", pModel);
}

Thanks, Chris