I am trying to run richfaces 3.3.0GA portlet in liferay 5.1.2 using jboss portletbrdige beta6

I am getting the following exception while rendering a sample portlet

SEVERE: Error Rendering View[/dWRFDemo1.xhtml]
java.lang.ClassCastException: org.jboss.portletbridge.BufferedRenderResponseWrapper
at com.sun.facelets.FaceletViewHandler.createResponseWriter(FaceletViewHandler.java:370)
at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:571)
at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:100)
at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:176)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:106)
at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)


Can you please help ?