struts2 dojo plugin (ajax)

[Daniel]

I am trying to integrate struts and ajax trough dojo plugin. Freemarker is
trowing me an error :

freemarker.core.InvalidReferenceException: Expression parameters.pushId is
undefined on line 97, column 6 in template/ajax/submit.ftl.

Anyone know what that mean?

This is my jsp page :

<s:form name="search" action="search" namespace="/s" id="searchForm">
    <table width="100%" align="center" cellpadding="0" cellspacing="0">
        <tr>
            <td style="padding:10px;">

                    <table width="50%" align="center" cellpadding="0"
cellspacing="0">
                        <tr>
                            <td>
                                <s:textfield name="doc1" label="doc1"/>
                                      <s:submit value="Seach" theme="ajax"
id="searchPutton"/>
                            </td>
                        </tr>
                    </table>

            </td>
        </tr>
    </table>

</s:form>

My libs :

struts2-dojo-plugin-2.1.1-SNAPSHOT.jar
struts2-core-2.1.1-SNAPSHOT.jar