nagevação de paginas com ajax ,componentes nao funcionam

<ui:fragment xmlns="http://www.w3.org/1999/xhtml"
                xmlns:h="http://java.sun.com/jsf/html"
                xmlns:p="http://primefaces.prime.com.tr/ui"
                xmlns:ui="http://java.sun.com/jsf/facelets"
                xmlns:f="http://java.sun.com/jsf/core"
                >


    <h:form prependId="false">

        <table width="100%" style="  font-size: 12px;">
            <tr>

                <td width="50%">
            <h:outputText value="GUERAPA.COM" style="font-size:36px; text-align: center"/>
            </td>
            <td>
                <a href="http://twitter.com/share"     >Tweet</a>&lt;script type="text/javascript" src="http://platform.twitter.com/widgets.js"&gt;&lt;/script&gt;
            &lt;/td&gt;
            &lt;td&gt;

                &lt;h:panelGroup&gt;
                    &lt;p:commandLink action="#{paginasBean.paginaDesprotetor}" update="#{p:component('centro')}" ajax="false"&gt;


                    &lt;p:graphicImage value="/images/cadeado.png" style="width: 50px; height: 50px;"/&gt;
                    Guerapa Desprotetor
            &lt;/p:commandLink&gt;
                &lt;/h:panelGroup&gt;
            &lt;/td&gt;
            &lt;td&gt;
                &lt;h:panelGroup&gt;
                    &lt;p:commandLink action="#{paginasBean.paginaDownloads}" update="#{p:component('centro')}" ajax="false"&gt;
                    &lt;p:graphicImage value="/images/download.png" style="width: 50px; height: 50px;"/&gt;
                    Guerapa Downloads
            &lt;/p:commandLink&gt;
                &lt;/h:panelGroup&gt;
            &lt;/td&gt;
            &lt;td&gt;
            &lt;h:panelGroup&gt;
                &lt;p:graphicImage value="/images/tutorial.png" style="width: 50px; height: 50px;"/&gt;
                Guerapa Tutoriais
            &lt;/h:panelGroup&gt;
            &lt;/td&gt;
            &lt;/tr&gt;
        &lt;/table&gt;
&lt;/h:form&gt;


&lt;/ui:fragment&gt;

<ui:composition xmlns="http://www.w3.org/1999/xhtml"
                xmlns:h="http://java.sun.com/jsf/html"
                xmlns:p="http://primefaces.prime.com.tr/ui"
                xmlns:ui="http://java.sun.com/jsf/facelets"
                xmlns:f="http://java.sun.com/jsf/core"
                template="template.xhtml">

 
        <ui:define name="topo">
           
            <ui:include src="topo.xhtml"/>
          
        </ui:define>

   
    <ui:define name="centro">
 <h:form id="formCentro">
        <p:outputPanel id="centro">
            <ui:include src="#{paginasBean.paginaPrincipal}"/>
        </p:outputPanel>
 </h:form>
    </ui:define>

<ui:fragment
    xmlns="http://www.w3.org/1999/xhtml"
    xmlns:ui="http://java.sun.com/jsf/facelets"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:f="http://java.sun.com/jsf/core"
    xmlns:p="http://primefaces.prime.com.tr/ui">

                                   
                                    <p:commandButton value="Converter" action="#{desprotetorBean.faz}">
                                    
                                    </p:commandButton>
   
</ui:fragment>

<ui:fragment
    xmlns="http://www.w3.org/1999/xhtml"
    xmlns:ui="http://java.sun.com/jsf/facelets"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:f="http://java.sun.com/jsf/core"
    xmlns:p="http://primefaces.prime.com.tr/ui">

    <table align="center">
        <tr>
            <td align="center">
            
  
            <h:panelGrid columns="3" style="">
           
                
                <h:outputLabel value="Filtro: "/>
                <h:inputText id="textoBusca" value="#{buscaPost.textoBusca}" size="100">
                <p:ajax event="keyup" process="textoBusca" listener="#{buscaPost.Busca}" update="resultado" />
                 
                </h:inputText>


                <p:ajaxStatus style="width:16px;height:16px;">
                    <f:facet name="start">
                        <h:graphicImage value="/ajaxloading.gif" style="width: 16px; height: 16px;" />
                    </f:facet>

                    <f:facet name="complete">
                        <h:outputText value="" />
                    </f:facet>
                </p:ajaxStatus>


    </h:panelGrid>
             

     

     <h:panelGrid id="resultado">
         <p:dataGrid id="listaArquivos" var="arq" value="#{buscaPost.listArquivos}" columns="2" >


                <p:column>

                    <p:panel style="width: 100%;">


                            <h:panelGrid columns="2" style="text-align: left;">

                                <p:graphicImage value="#{arq.urlImage}" style="width: 120px; height: 120px;"/>
                                <h:panelGrid>
                                    <h:outputLabel value="#{arq.nome}" style="font-weight: bold; font-size: 12px; color: red;"/>
                                <h:outputText value="#{arq.dataPost}" style="font-weight: bold;"/>
                                <h:outputLink value="http://www.guerapa.com/paginas/#{arq.urlArquivo}.html" target="_blank" style="font-size: 20px;">Mais info</h:outputLink>
                                </h:panelGrid>
                                
                            </h:panelGrid>




                    </p:panel>
                </p:column>
          </p:dataGrid>

    </h:panelGrid>
      
    </td>
    </tr>
           
    </table>
</ui:fragment>