Help to explain how a Conversation is propagated with an ajax event

[tom_goring]

Hi,

I have the following page:

<rich:panel header="example">
<h:form id="reg">


<h:commandButton execute="@form" action="#{sampleBean.toggle()}" value="POST" /><br/>
<a4j:commandButton execute="@form" action="#{sampleBean.toggle()}" render="@form" value="AJAX_FORM" /><br/>
<a4j:commandButton execute="@form" action="#{sampleBean.toggle()}" render="test1" value="AJAX_TEST" /><br/>


<a4j:outputPanel id="test1">
<h:outputText value="Open" rendered="#{sampleBean.open}"/>
<h:outputText value="Close" rendered="#{!sampleBean.open}"/>
</a4j:outputPanel>


</h:form>
</rich:panel>

sampleBean is @ConversationScoped.

Can someone explain why buttons "POST" and "AJAX_FORM" work (i.e. conversation is started and toggle works) where as "AJAX_TEST" does not.

I.e. just rendering the test1 area I expect is not proporgating the conversation id.  How can I get it to work with out having to re render the whole form (as per AJAX_FORM).

Thanks for your help.

Tom