How to Insert Json To Request and parse the json response data

Hi Guys, 

URL: http://some path/userLogin.html?json=[{"emailid":"vijayajay17@gmail.com","password":"vijay17"}]
o/p: {"login":{"loginmsg":"successful","userid":"20","user_type":"Voter"}}

If I will Run this URL is web browser I should get the above o/p in json format.

in code:

                    JSONObject j = new JSONObject();
                    j.put("emailid", "vijayajay17@gmail.com");
                    j.put("password", "vijay17");                   
                    String url = "http://some path/userLogin.html";
                    HttpClient httpclient = new DefaultHttpClient();
                    HttpPost request = new HttpPost(url);               
                    StringEntity stringEntity = new StringEntity(j.toString());
                    stringEntity.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, "application/json"));
                    HttpEntity httpEntity = stringEntity;
                    request.setEntity(httpEntity);
                    HttpResponse response = httpclient.execute(request);
                   
                    String temp = EntityUtils.toString(response.getEntity());
                    System.out.println(temp);
                   


         My O/P: {"login":{"loginmsg":"account not activated"}}

Can Any one help me in this?
Where I am doing mistake?

 Thanks in Advance.
.