Problem with dataTable + SelectOneMenu

[santima17]

I have the next source in my page.

<p:dataTable
var="cupo"
value="#{visualizarCuposBean.cupos}"
paginator="true"
rows="10"
selection="#{visualizarCuposBean.cupoSeleccionado}"
selectionMode="single"
onRowSelectUpdate="display"
onRowSelectComplete="detalleCupo.show()"
id="tablaCupos"
....

.....
<p:column>
<f:facet name="header">
<h:outputText value="Acciones" />
</f:facet>
<h:selectOneMenu id="cmboxAccion" value="#{visualizarCuposBean.selectedAccion}" >
<f:selectItems value="#{cupo.acciones}" var="item" itemValue="#{item.value}" itemLabel="#{item.label}" />
</h:selectOneMenu>
<p:commandButton value="Ejecutar" action="#{visualizarCuposBean.ejecutarAccion}" />

</p:column>
</p:dataTable>

***cupos.acciones = private dtItemAccion[] acciones,
dtItemAccion have two atributtes, value and label.
-------------------------------------------------------------------------------------------------------------------------------------------
and the next source in my pageBean.

@ManagedBean(name="visualizarCuposBean")
@ViewScoped
public class visualizarCuposBean implements Serializable{

private List<dtCupo> cupos;
private dtCupo cupoSeleccionado = new dtCupo();
private String selectedAccion;
private interfaceBQB iBQB;

public visualizarCuposBean() {
this.iBQB = new interfaceBQB();
cupos = iBQB.listadoCuposWeb(); //this return my cupos list
}

public void ejecutarAccion(){
//assign new value to localeCode
FacesContext context = FacesContext.getCurrentInstance();
UIComponent cmboxAccion = findComponent(context.getViewRoot(), "cmboxAccion");
Map<String,Object> atributos = cmboxAccion.getAttributes();
String accionString = (String)atributos.get("value");
System.out.println("Accion:::"+accionString);
}

public dtCupo getCupoSeleccionado() {
return cupoSeleccionado;
}

public void setCupoSeleccionado(dtCupo cupoSeleccionado) {
this.cupoSeleccionado = cupoSeleccionado;
}

public List<dtCupo> getCupos() {
return cupos;
}

public void setCupos(List<dtCupo> cupos) {
this.cupos = cupos;
}

public String getSelectedAccion() {
return selectedAccion;
}

public void setSelectedAccion(String selectedAccion) {
this.selectedAccion = selectedAccion;
}

private UIComponent findComponent(UIComponent parent, String id){
if(id.equals(parent.getId())){
return parent;
}else{
Iterator<UIComponent> kids = parent.getFacetsAndChildren();
while(kids.hasNext()){
UIComponent kid = kids.next();
UIComponent found = findComponent(kid,id);
if (found != null){
return found;
}
}
return null;
}
}

}

in ejecutarAccion() i'm use findelement(), this function return properly the current selectOneMenu , but the value of this current select is always the first elemento of cupos.acciones.

Can you help my with this error?

I'm using primefacesRC2.2

Thank you
Santiago