A4j nao renderiza

<a4j:form id="form1" ajaxSubmit="true" ignoreDupResponses="true" requestDelay="500">                    
                         <h:inputText value="#{detalhaVotacaoBean.ordenacao}"/>
                        <a4j:commandLink actionListener="#{detalhaVotacaoBean.setOrdem}"
                            reRender="carList">
                            <f:verbatim> aee </f:verbatim>
                             <f:attribute name="ordenacao" value="nr_zona"/>
                        </a4j:commandLink>
            <h:commandButton value="Cadastrar" type="button">
			<a4j:support event="onclick" actionListener="#{detalhaVotacaoBean.setOrdem}" />
		</h:commandButton>
               
               <rich:dataTable width="300" id="carList" rows="10"
                    value="#{detalhaVotacaoBean.votacao}" var="votacao">
                    <f:facet name="header">
                        <rich:columnGroup>
                            <h:column>
                                <h:outputText styleClass="headerText" value="nome" />
                            </h:column>
                            <h:column>
                                <h:outputText styleClass="headerText" value="Candidato" />
                            </h:column>
                            <h:column>
                                <h:outputText styleClass="headerText" value="Zona" />
                            </h:column>
                            <h:column>
                                <h:outputText styleClass="headerText" value="Bairro" />
                            </h:column>
                            <h:column>
                                <h:outputText styleClass="headerText" value="Votos" />
                            </h:column>                            
                        </rich:columnGroup>
                    </f:facet>

                    <h:column>
                        <h:outputText value="#{votacao.nm_vila_jardim}" />
                    </h:column>
                    <h:column>
                        <h:outputText value="#{votacao.nm_pessoa}" />
                    </h:column>
                    <h:column>
                        <h:outputText value="#{votacao.nm_bairro}" />
                    </h:column>
                    <h:column>
                        <h:outputText value="#{votacao.nr_zona}" />
                    </h:column>
                    <h:column>
                        <h:outputText value="#{votacao.vl_votacao_candidato}" />
                    </h:column>
                </rich:dataTable>


            <rich:spacer height="15" />

    </a4j:form>

public class DetalhaVotacaoBean {

    public DetalhaVotacaoBean() {
    }
    private String ordenacao = null;
    
    public Result getVotacao() {
        Collection toReturn = new ArrayList();
        ResultSet rs = null;
        try {
            Connection conexao = Conexao.getInstancia().conectarDb();
            PreparedStatement st = conexao.prepareStatement("SELECT tb_pessoa.nm_pessoa, tb_bairro.nm_bairro, tb_zona.nr_zona, tb_vila_jardim_bairro.nm_vila_jardim, vl_votacao_candidato FROM tb_votacao JOIN tb_pessoa ON tb_pessoa.cd_pessoa = tb_votacao.cd_pessoa JOIN tb_vila_jardim_bairro ON tb_vila_jardim_bairro.cd_vila_jardim = tb_votacao.cd_vila_jardim JOIN tb_bairro ON tb_bairro.cd_bairro = tb_vila_jardim_bairro.cd_bairro JOIN tb_zona ON tb_zona.cd_zona = tb_bairro.cd_zona ORDER BY ?");
            st.setString(1, ordenacao);
            rs = st.executeQuery();
            
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
        return  ResultSupport.toResult(rs);
    }

    public void setOrdenacao(String ordenacao) {
        this.ordenacao = ordenacao;
    }

    public String getOrdenacao() {
        return ordenacao;
    }

    public void setOrdem(ActionEvent e){
        System.out.println("aeeee");
        this.ordenacao = "nm_bairro";
    }

}

<managed-bean>
        <managed-bean-name>detalhaVotacaoBean</managed-bean-name>
        <managed-bean-class>br.com.dnasolution.bean.DetalhaVotacaoBean</managed-bean-class>
        <managed-bean-scope>session</managed-bean-scope>
    </managed-bean>