ReRender RichFaces element stored in a4j:included page

I've got a panelMenu in an a4j:included xhtml page included in another JSF page. When an a4j:commandButton is hit in the parent page, some data changes in the included file and I'd like to reRender an element storing it. In the example snippet below, controlPanel is reRendered as part of this operation but this doesn't seem to be enough.

When the app first loads, it looks to reRender the element in the a4j:included page directly (if I put it in the reRender attribute list) but the console warns as it's not included yet.

Is there a way round this?

Parent:

<rich:toolBarGroup location="right">
                    <h:panelGrid columns="1" id="controlPanel">
                        <a4j:region>
                            <a4j:include viewId="#{MyBacking.ctrlBox}">
                                <f:param name="targetIdParam" value="controls" />
                            </a4j:include>
                        &开发者_开发技巧lt;/a4j:region>
                    </h:panelGrid>
                </rich:toolBarGroup>