Sling Servlet Resolver has issue with Post method

[img]PostMethod.png[/img]

Hi , I have written a custom servlet which  extend SlingAllMethodsServlet. Post request did not resolve by CQ5 server , as we can see in attached  image.

My code in servelet class .   I am using CQ5.6.1 .

@SlingServlet(
        resourceTypes = {"sling/servlet/default"},
        methods =  {"GET", "POST"},
        selectors = {"UserQueryHandlerServlet"},
        extensions = {"json"}
    )

public class UserQueryHandlerServlet extends SlingAllMethodsServlet {

    @Override
    protected void doGet(SlingHttpServletRequest request,SlingHttpServletResponse response) throws ServletException,
            IOException {
        
            String responseString = processRequest(request,response);
            response.getWriter().write(responseString);
    }

        
       
    @Override
    protected void doPost(SlingHttpServletRequest request,SlingHttpServletResponse response) throws IOException {
        String responseString = processRequest(request,response);
        response.getWriter().write(responseString);        
    }

}

For the doGet() I am getting my Servlet in  Adobe Experience Manager Web Console Sling Servlet Resolver  but for doPost() getting   --com.day.cq.commons.servlets.NonExistingDispatcherServlet (OptingServlet).

And I followed the below mention URL

1- http://sling.apache.org/documentation/the-sling-engine/servlets.html

2-http://help-forums.adobe.com/content/adobeforums/en/experience-manager-forum/adobe-experience-manager.topic.html/forum__mykw-hey_there_imt.html?cacheBust=1381235876565

3-http://labs.sixdimensions.com/blog/dan-klco/2012-12-01/gotcha-sling-servlet-requires-name

4-http://blogs.adobe.com/aaa/tag/sling

Basically my issue doPost() method did not call. I am getting 500 error for doPost method.

I go through all above links. But my problem did not resolve. Please help me please.