Jsf Rich:poppuppanel don'；t打开

我不能打开一个rich:popPupPanel有人可以帮我我的代码如下

<a4j:commandButton  value="Pergunta" action="#{gameController.buscarPergunta()}" render="painelPergunta" ></a4j:commandButton>
    <a4j:outputPanel ajaxRendered="true" id="panelPopPup">
        <rich:popupPanel id="popup" modal="true" autosized="true" resizeable="false">
            <h:outputLabel value="testando..." />
        </rich:popupPanel>
    </a4j:outputPanel>

<a4j:commandButton value="Responder" actionListener="#{gameController.responder()}" oncomplete="#{rich:component('popup')}.show()}" render="painelPergunta panelPopPup">

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FALTAVA O atribute SHOW

能否从

{rich:component（'popup'）}.SHOW（）中删除最后一个
}
？
<a4j:commandButton  value="Pergunta" SHOW="TRUE" action="#{gameController.buscarPergunta()}" render="painelPergunta" ></a4j:commandButton>
<a4j:outputPanel ajaxRendered="true" id="panelPopPup">
    <rich:popupPanel id="popup" modal="true" autosized="true" resizeable="false">
        <h:outputLabel value="testando..." />
    </rich:popupPanel>
</a4j:outputPanel>