title: Issue <p:ajax> with Dynamic Columns
body: <p>I am using primefaces 3.5 . I am trying to use <code>&lt;p:ajax&gt;</code> with dynamic columns.  </p>
  
  <p><code>&lt;p:ajax&gt;</code> does not fire the action I expect.  My code is given below </p>
  
  <pre><code>&lt;p:datatable  id = "table"&gt;
      &lt;p:columns id="columns" value="#{controller.columnHeaders}" var="columnHeader" &gt;
          &lt;f:facet name="header"&gt; 
              &lt;h:outputText  value="#{columnHeader._label}" /&gt;
          &lt;/f:facet&gt;
      &lt;p:inputText rendered="#{columnHeader._editable}"
                   value="#{orderController.columnValue}" &gt;
          &lt;p:ajax event = "keyup" update = "table"
                  listener = "#{controller.totalRateCalculation}"/&gt;
          &lt;/p:inputText&gt;
      &lt;h:outputLabel rendered="#{!columnHeader._editable}"
                     value="#{orderController.columnValue}" /&gt;
      &lt;/p:columns&gt;
  &lt;/p:datatable&gt;
  </code></pre>
  
  <p>Anybody help me !!!</p>