1. I have a scrollableDataTable, and on mouse right click, I expected that right click would bring contextMenu but it doesn't. why?

<rich:componentControl event="concontextmenu" for="caseMenu" operation="show">
 <f:param value="#{record.caseNumber}" name="idNumber" />
</rich:componentControl>
<rich:contextMenu attached="false" id="caseMenu" submitMode="ajax">
 <rich:menuItem id="caseAssignMenuItem" ajaxSingle="true" oncomplete="javascript:Richfaces.showModalPanel('Assign')" reRender="AssignPanel">
 Assign <b>{idNumber}</b>
 <a4j:actionparam name="assignParam" assignTo="#{caseActionBean.idNumber}" value="{idNumber}"/>
 </rich:menuItem>
 <rich:menuSeparator/>
 <rich:menuGroup value="Move to">
 <rich:menuItem id="casMoveMenuItem" ajaxSingle="true" oncomplete="javascript:Richfaces.showModalPanel('Assign')" reRender="AssignPanel">
 Assign <b>{idNumber}</b>
 <a4j:actionparam name="assignParam" assignTo="#{caseActionBean.idNumber}" value="{idNumber}"/>
 </rich:menuItem>
 </rich:menuGroup>
 </rich:contextMenu>

This has already been asked in the forum but no response.

2. In the same code above, the menuGroup name is shown, but no menuItems are displayed.

The demo seems to be working fine. I copied the same code but can't understand why it doesn't work for me.