P:dataExporter Primafaces

Pessoal, estou testando o novo componente do prime, para exportar os dados de um datatable, porem esta dando erro abaixo:
type Exception report

message

descriptionThe server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: org/apache/poi/ss/usermodel/RichTextString

root cause

java.lang.NoClassDefFoundError: org/apache/poi/ss/usermodel/RichTextString

root cause

java.lang.ClassNotFoundException: org.apache.poi.ss.usermodel.RichTextString not found by org.primefaces [277]

note The full stack traces of the exception and its root causes are available in the GlassFish Server Open Source Edition 3.1.2.2 logs.

Obs. tentei baixar o jar primefaces-3.0.RC1-SNAPSHOT, mesmo assim esta dando problema

seque abaixo a rotina :

<p:dataTable id="datatablemonitorguias" value="#{monitorMbean.tmpguiasList}" var="tmpguiasList" emptyMessage="Nenhum registro encontrado."   
                             paginator="true" rows="10"  pageLinks="10" 
                             paginatorTemplate="{CurrentPageReport} {FirstPageLink} {PreviousPageLink} {PageLinks}   
                             {NextPageLink} {LastPageLink} Registros por página: {RowsPerPageDropdown}"  
                             rowsPerPageTemplate="5,10,15,20" lazy="true" style="width: 100%">
                    <p:column       
                        rendered="#{monitorMbean.chkmesref}"
                        headerText="Dt. Ini"
                        style="width:2%; font-size:8px;font-family:arial,Tahoma,Sans-serif; text-align: center;"
                        >  
                        <h:outputText value="#{tmpguiasList.mesref}"
                                      >
                            <f:convertDateTime pattern="dd/MM/yyyy"/>  
                        </h:outputText>
                    </p:column> 

                   <p:column  
                        headerText="Cod. Prest"
                        style="width:96%; font-size:8px;font-family:arial,Tahoma,Sans-serif; text-align: center;"
                        >  
                        <h:outputText value="#{tmpguiasList.valtxintmaq}" converter="conversorCasasDecimaisSimples">  
                             
                        </h:outputText>
                    </p:column>  
                    
                    <p:column  
                        headerText="Cod. Prest"
                        style="width:96%; font-size:8px;font-family:arial,Tahoma,Sans-serif; text-align: center;"
                        >  
                        <h:outputText value="#{tmpguiasList.valtxintfilme}" converter="conversorCasasDecimaisSimples">  
                             
                        </h:outputText>
                    </p:column>                     

                    <p:column  
                        headerText="Cod. Prest"
                        style="width:96%; font-size:8px;font-family:arial,Tahoma,Sans-serif; text-align: center;"
                        >  
                        <h:outputText value="#{tmpguiasList.valfator}" converter="conversorCasasDecimaisSimples">  
                             
                        </h:outputText>
                    </p:column>                       
                </p:dataTable>

                <h:panelGrid columns="2">  
                    <p:panel header="Export All Data"> 
                        <h:commandLink>  
                            <p:graphicImage value="../resources/images/avisos.png" />  
                            <p:dataExporter type="xls" target="datatablemonitorguias" fileName="datatablemonitorguias" />  
                        </h:commandLink> 
                    </p:panel>
                </h:panelGrid>

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