Olá, estou com o seguinte problema, tenho um formulário com abas e um botão a4jcommandButton, quando eu clico nele a primeira vez ele funciona normalmente, chama o action e da o reRender normalmente, mas se eu clicar de novo o action não é executado, todos os Beans estão com o escopo = session
segue o codigo
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@ taglib uri="http://richfaces.org/a4j" prefix="a4j"%>
<%@ taglib uri="http://richfaces.org/rich" prefix="rich"%>
<html>
<body>
<f:view>
<a4j:form id="form">
<rich:panel rendered="#{Controlador.atividadeAndamento == 'teste'}" id="teste" style="width:80%; height:100%; float: right; display: block;">
<rich:tabPanel switchType="server">
<rich:tab label="Entrada" style="border-color:green;" >
<rich:panelBar height="100%" width="100%">
<rich:panelBarItem label="Espontâneo">
<rich:panel style="width:500px; height:400px; background-color:rgb(240,240,240); " id="panel1" >
</rich:panel>
</rich:panelBarItem>
</rich:panelBar>
</rich:tab>
<rich:tab label="Mecanismo" style="border-color:orange;" disabled="true">
<rich:panelBar height="100%" width="100%">
</rich:panelBar>
</rich:tab>
<rich:tab label="Controle" style="border-color:orange;" disabled="true">
<rich:panelBar height="100%" width="100%">
</rich:panelBar>
</rich:tab>
<rich:tab label="Saida" style="border-color:red;" action="#{teste.Validacao}">
<rich:panelBar height="100%" width="100%">
<rich:panelBarItem label="Fornecedor">
<h:commandLink rendered="#{javabean.resposta == 'Ok'}">
<h:graphicImage url="/imagens/sinal_verde.png"></h:graphicImage>
</h:commandLink>
<h:commandLink rendered="#{javabean.resposta != 'Ok'}">
<h:graphicImage url="/imagens/sinal_vermelho.png"></h:graphicImage>
</h:commandLink>
<rich:panel style="width:500px; height:600px; background-color:rgb(240,240,240); " id="Evento" >
<h:inputText value="#{javabean.apa_10_03_04_525}" style="position:absolute; margin-left:195px; margin-top:-9px; width:200px; height:30px; background-color:-1;"/>
<h:outputFormat value="Nome Fantasia" style="position:absolute; margin-left:55px; margin-top:21px; width: 130px; height:31px;"/>
</rich:panel>
<rich:panel id="botao">
<a4j:commandButton value=" ak- " action="#{javabean.Verificacao}" reRender="Evento,botao"/>
</rich:panel>
</rich:panelBarItem>
</rich:panelBar>
</rich:tab>
</rich:tabPanel>
</rich:panel>
......
</a4j:form>
</f:view>
</body>
</html>