javascript - Sending JSON jQuery to ASHX - Success Callback not Triggering -

i sending data form via jquery ajax json formatted data. file processing on server ashx handler.

below - code snippet:

// jquery ajax json ...  $.ajax({              type: "post",             url: "handler.ashx",             data: $.tojson(formdata),             datatype: "json",             contenttype: "application/json; charset=utf-8",             success: function(response) {                 $('#ajax-loader').hide();                 $('#msg').html("ok!");             },             error: function(response) {                 $('#ajax-loader').hide();                 $('#msg').html("error!");             } }); 

---

// handler.ashx...  public void processrequest(httpcontext context) {      context.response.contenttype = "text/plain";       string json = requestbody(context.request);     javascriptserializer js = new javascriptserializer();     formdata formdata = js.deserialize<formdata>(json);      // business process ...       // ...       context.response.write("ok - right");  } 

however, jquery performs error instead of success callback function, if server worked. can happening?

success callback not triggering. adjustments recommend?

obs: status ok 200 - firebug response.