Ajax with Struts2

 My question is ...
When I use this code <s:url id="ajaxTest"
value="getBusinessProfileprofileAction.action"
/>
<s:a theme="ajax" href="%{ajaxTest}" targets="div1">Business</s:a>
in between action form ,then I got warning like WARNING: Parameters: Invalid
chunk ignored.  and ajax action is not performed.
please answer to my question very urgent