Select many check box problem

Question

I'm having a lot of trouble with a selectManyCheckBox. I've got a faces panelTabbedPane - and one of the tabs contains a selectManyCheckbox. All the data in the tabs applies to the same bean so I want to apply all the changes or none of them.
If I don't have the h:form around the tab then the check boxes aren't initialised. However with the h:form when I try and submit the form the checkbox values don't get set on my bean.
What am I doing wrong and how do I fix it? Any help would be appreciated.
JSP containing the panel tabbed pane
    <h:form id="edit.form">
        <x:messages id="messageList" showSummary="true" showDetail="true" summaryFormat="{0}:" styleClass="error" />
        <x:panelTabbedPane title="#{msg['account.edit.tabs.title']}" >
            <f:subview id="tab1" >
                <jsp:include page="editGeneral.jsp"/>
            </f:subview>
                <h:form id="roles.form">
            <f:subview id="tab2" >
                        <jsp:include page="editRoles.jsp"/>
            </f:subview>
                </h:form>
            <f:subview id="tab3" >
                <jsp:include page="editPreferences.jsp"/>
            </f:subview>
            <f:subview id="tab4" >
                <jsp:include page="editCustomers.jsp"/>
            </f:subview>
            <f:verbatim><br /></f:verbatim>
            <x:commandButton id="editButton" value="#{msg['account.update']}" action="#{selectedAccount.update}" title="#{msg['account.update.alt']}" />
            <x:commandButton id="cancel" immediate="true" value="#{msg['enable.cancel']}" action="cancel" title="#{msg['enable.cancel.alt']}" />
        </x:panelTabbedPane>
    </h:form>And the included JSP
<x:panelTab label="#{msg['account.edit.tab.roles']}" title="#{msg['account.edit.tab.roles.title']}" >
    <h:panelGrid columns="2" >
        <h:outputLabel for="roles" value="#{msg['account.edit.role']}" />
        <h:selectManyCheckbox id="roles" value="#{selectedAccount.roles}" layout="pageDirection" styleClass="menuSelectMany" >
            <f:selectItems value="#{userPreferences.roles}" />
        </h:selectManyCheckbox>
    </h:panelGrid>
</x:panelTab>Thanks

Answer 1

What type does 'userPreferences.roles' represent in your included jsp?
Is it a collection of Role classes returned as a SelectItem array?