Conflit with rich:modalPanel

[lipe.82]

Hi guys, I am using RichFaces 3.3.3.Final and AjaxServlet, (AjaxServlet extends HttpServlet).

When I put <rich:modalPanel> in my .xhtml the console shows a conflit:

CRIPT438: O objeto não oferece suporte à propriedade ou método 'fireEvent'

3_3_3.Finalorg.ajax4jsf.javascript.PrototypeScript.faces, linha 265 Caractere 107

and

event.eventName=eventName;event.memo=memo||{};if(document.createEvent){element.dispatchEvent(event);}else{element.fireEvent(event.eventType,event);}

The console also show two options:

ajax4hsf.javascript.AjaxScript.faces and ajax4hsf.javascript.PrototypeScript.faces

Is anybody know how to take off this conflit?

Best Regards. Felipe