p:dialog doesn't fire ajax close event - primefaces

Question

My listener method is not fired when I close the dialog box using the close button. I don't understand why happens this...
XHTML page where dialog is located
<?xml version="1.0" encoding="ISO-8859-1"?>
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:p="http://primefaces.org/ui"
xmlns:sec="http://www.springframework.org/security/tags"
template="/templates/template.xhtml">
<ui:define name="content">
<f:view>
<p:outputPanel id="opWindowsDlgViewUser">
<p:dialog id="dlgViewUser" widgetVar="wvDlgViewUser"
header="#{personaController.titleDlgViewUser}"
dynamic="true"
modal="true" closable="true" resizable="false">
<p:ajax event="close"
listener="#{sistemaController.onCloseDlgUsuario}"/>
<p:outputPanel id="opViewUser">
<ui:include src="/content.xhtml"></ui:include>
</p:outputPanel>
</p:dialog>
</p:outputPanel>
</f:view>
</ui:define>
</ui:composition >
Listener method
public void onCloseDlgUsuario(CloseEvent event){
System.out.println("onCloseDlgUsuario");
idRol = null;
this.fechaInicial = null;
this.fechaFinal = null;
}
[UPDATE]
Add XHTMl page content.xhtml
content.xhtml
<?xml version="1.0" encoding="ISO-8859-1" ?>
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:p="http://primefaces.org/ui"
xmlns:sec="http://www.springframework.org/security/tags" >
<script type="text/javascript">
function unloadPage(){
if(#{sistemaController.renderAutoCompletePersonas}){
cleanText('acUsuario_input');
document.getElementById('acUsuario_input').focus();
}
}
</script>
<p:messages showDetail="true" closable="true"/>
<h:panelGrid columns="2">
<p:outputLabel value="Usuario " for="acUsuario"
rendered="#{sistemaController.renderAutoCompletePersonas}"/>
<p:autoComplete id="acUsuario" widgetVar="wvAcUsuario" minQueryLength="3"
completeMethod="#{sistemaController.completeListPersonasDisponibles}" var="p"
value="#{sistemaController.selectedPerson}"
rendered="#{sistemaController.renderAutoCompletePersonas}" scrollHeight="200"
itemLabel="#{p.apePaterno} #{p.apeMaterno} #{p.nombre} #{p.nombre2}"
itemValue="#{p}" converter="personaConverter" >
</p:autoComplete>
</h:panelGrid>
<h:panelGrid columns="2">
<p:outputLabel value="Rol" for="sltUserRol"/>
<p:selectOneMenu id="sltUserRol" value="#{sistemaController.idRol}" >
<p:ajax event="change" update="sltUserRol" />
<f:selectItem itemLabel="--Seleccione un Rol--" noSelectionOption="true" itemDisabled="true"/>
<f:selectItems value="#{sistemaController.listRolesActivos}" var="r"
itemLabel="#{r.valor}" itemValue="#{r.id}"/>
</p:selectOneMenu>
</h:panelGrid>
<h:panelGrid columns="3">
Acceso
<h:panelGroup>
<h:outputText value="Desde " />
<p:commandButton icon="ui-icon-refresh" title="Limpiar"
actionListener="#{sistemaController.cleanFechaInicial}" update="clnFechaInicial"/>
<p:calendar id="clnFechaInicial" value="#{sistemaController.fechaInicial}"
widgetVar="wvFechaInicial" pattern="dd/MM/yyyy" mode="inline" locale="es"/>
</h:panelGroup>
<h:panelGroup>
<h:outputText value=" Hasta "/>
<p:commandButton icon="ui-icon-refresh" title="Limpiar"
actionListener="#{sistemaController.cleanFechaFinal}" update="clnFechaFinal"/>
<p:calendar id="clnFechaFinal" value="#{sistemaController.fechaFinal}"
widgetVar="wvFechaFinal" pattern="dd/MM/yyyy" mode="inline" locale="es"/>
</h:panelGroup>
<p:commandButton id="btnGuardar" title="Guardar" icon="ui-icon-disk" value="Guardar"
rendered="#{sistemaController.renderAutoCompletePersonas}"
actionListener="#{sistemaController.addUserToSystem}"
oncomplete="unloadPage()"
update="opDlgUsuario, dtUsersSystem"/>
<p:commandButton id="btnActualizar" title="Actualizar" icon="ui-icon-disk" value="Actualizar"
rendered="#{not sistemaController.renderAutoCompletePersonas}"
actionListener="#{sistemaController.updateUserSystem}"
update="opDlgUsuario, dtUsersSystem"/>
</h:panelGrid>
</ui:composition>