Getting undefined error on ajax call

[Praveen . V . Kumar]

Hi,

I'm using struts 2.1.6, struts2-dojo-plugin-2.1.6.jar, xwork-2.1.2, freemarker 
2.3.13, ognl 2.6.11 and jboss 5.0.1.

In ftl, I am making ajax call in <sx.a> tag as shown below.

<@s.url id="sort" namespace="${parameters.nameSpace}" action="Sort">
<@s.param name="sortBy">${tmpSortMethodName?trim}</@s.param>
            <@s.param name="sortType">desc</@s.param>
</@s.url>
<@sx.a href="${sort}" key="${tmpColumnName}" targets="content">
<@s.text name="${tmpColumnName}"/><img src="<@s.url 
value="/images/sortAsc.gif"/>" alt="<@s.text name="app.sortBy"/>: <@s.text 
name="${tmpColumnName}"/>"
title="<@s.text name="app.sortBy"/>: <@s.text name="${tmpColumnName}"/>" 
class="arrowWhite" align="texttop"/>
</@sx.a>

I have added <%@ taglib prefix="sx" uri="/struts-dojo-tags" %>
and   <sx:head debug="true" cache="false" compressed="false" />

But still I am getting the "undefined error" in the screen and "Parameters: 
Invalid chunk ignored" in the server.

Please help in resolving this issue.

Thanks
Praveen