selectManyCheckbox does not reRender

[pottersc]

I am having problems updating the dynamically changing the selected items in a selectManyCheckBox in reponse to a user selection from a pull down menu.
The pull down menu is defined as follows:

<h:selectOneMenu id="SectorSelect">
 <f:selectItems value="#{panelizationProperties.sectorSelectItems}"/>
 <a4j:support immediate="true" event="onchange" actionListener="#{panelizationProperties.updateSectorDependencies}" reRender="PanelSizeSelectionPanel"/>
 </h:selectOneMenu>

The code that displays the checkboxes is defined as follows:

<a4j:outputPanel id="PanelSizeSelectionPanel">
 <t:selectManyCheckbox id="PanelSizeSelection" layout="pageDirection" value="#{panelizationProperties.selectedPanelIDs}">
 <f:selectItems value="#{panelizationProperties.panelSizeSelectItems}" />
 </t:selectManyCheckbox>
 </a4j:outputPanel>

The actionListener is working as expected and is changing the values of the selectedPanelIDs string array properly based on changes in the pull down menu selection. I have set and get methods for selectedPanelIDs.

Any assistance on resolving this problem is greatly appreciated.

[damianharvey]

I had the same issue but putting the sleectOneMenu (or in my case a commandLink) in an a4j:region solved it.
The solution was here http://www.jboss.com/index.html?module=bb&op=viewtopic&t=114682

Cheers,

Damian.