hello, rich:panelMenuGroup's action seems not called. following is the source fragment:

<h:form id="form">
<rich:panelMenu id="left_menu" model="ajax" iconExpandedGroup="disc" iconCollapsedGroup="disc" iconExpandedTopGroup="chevronUp" iconGroupTopPosition="right"
iconCollapsedTopGroup="chevronDown" iconCollapsedTopPosition="right">
<c:forEach var="mainMenu" items="#{menuBean.mainMenus}">
<rich:panelMenuGroup label="#{mainMenu.name}" action="#{menuBean.updateByMain}">
<c:forEach var="subMenu" items="#{menuBean.subMenus}">
<rich:panelMenuItem label="#{subMenu.name}" action="#{menuBean.updateBySub}">
<f:param name="incidentCatalog" value="#{mainMenu.code}" />
<f:param name="lawCatalog" value="#{subMenu.id}" />
</rich:panelMenuItem>
</c:forEach>
</rich:panelMenuGroup>
</c:forEach>
</rich:panelMenu>
</h:form>

the menuBean.updateByMain never called, and menuBean.updateBySub is fine. thanks.