problem with ric:suggestionBox and set Object in a bean

[bijoubam]

hi

I use a a suggestionBox component for search object <fornitore> Tipe.

The suggestion works correctely, but i want set the Selected Object in my Vista ( vistaGestioneFatture)

i write this jsf page

<h:panelGrid columns="2" styleClass="allineaSinistra" >
            <h:outputText value="RICERCA PER RAGIONE SOCIALE" style="font-weight:bold"/>
            <h:panelGrid columns="2" border="0" cellpadding="0" cellspacing="0">
                <h:inputText style="margin:0px;" id="ragioneSocialeFornitore" value="#{controlloGestioneFatture.suggest.fornitore}" required="true" validator="#{validatoreFatture.convalidaNomeFornitore}"  />
                <h:message for="ragioneSocialeFornitore" styleClass="messaggio_errore" />
            </h:panelGrid>
            <h:outputText id="objects" style="font-weight:bold" />
        </h:panelGrid>
        <rich:suggestionbox height="200" width="200"
                            usingSuggestObjects="true"
                            onobjectchange="printObjectsSelected(#{rich:element('objects')}, #{rich:component('suggestion')});"
                            suggestionAction="#{controlloGestioneFatture.suggest.autocomplete}" var="cap"
                            for="ragioneSocialeFornitore" fetchValue="#{cap.ragioneSociale}" id="suggestion" tokens="," binding="#{controlloGestioneFatture.suggest.fornit}"  >
            <a4j:support ajaxSingle="true" event="onselect"   >
                <f:setPropertyActionListener  value="#{cap}"   target="#{vistaGestioneFatture.fattura.fornitore}"   />
            </a4j:support>
            <h:column>
                <h:outputText value="#{cap.ragioneSociale}"  />
            </h:column>
            <h:column>
                <h:outputText value="#{cap.partitaIva}"  />
            </h:column>
        </rich:suggestionbox>

when i Select a name of Fornitore the object Fornire ( cap)  will be set in the (vistaGestioneFatture.fattura.fornitore). It not work..

            <a4j:support ajaxSingle="true" event="onselect"   >
                <f:setPropertyActionListener  value="#{cap}"   target="#{vistaGestioneFatture.fattura.fornitore}"   />
            </a4j:support>

the object fornitore in the Fattura returned null

where is the problem?

help me !!