Problem with s:excelExport

[Adrian Mitev]

Hi! I have the following code:

<t:dataTable id="dtTable" value="#{bean.list}" rows="20" var="ls">
   <h:column>
       <h:outputText value="#{ls}" />
   </h:column>
</t:dataTable>

<br />

<s:excelExport for="dtTable">
  <h:commandButton action="" value="Export" />
</s:excelExport>

But when i select the export button what i got is the same page redisplayed
in new window.