jquery - IE9 XmlHttpRequest returns 12019 error instead of HTTP/417 response code -

i have error processing ajax request wcf service on client side,

 self.remove = function (dep, processingresult) {             var data = { "id": dep };             $.ajax({                 url: 'my.svc/remove',                 type: 'post',                 contenttype: 'application/json',                 datatype: "json",                 cache: false,                 data: json.stringify(data),                 complete: function (e, xhr, settings) {                     var message = self.getmessage(e.status);                                     switch (e.status) {                         case 200:                             processingresult();                             break;                                           case 417:                             console.log(e.statustext);                             radalert(message + e.statustext, null, null, "417");                             break;                         default:                             {                                 console.log(e.statustext);                                 radalert(message, null, null, "bekey");                             }                     }                 }             });         }; 

in case return error 417, ie9 getting result 12019 error instead. other browsers including ie10 getting correct value.

why happens , how fix ?

12019 - error_internet_incorrect_handle_state requested operation cannot carried out because handle supplied not in correct state.

looks return code not practice. right ?

  weboperationcontext ctx; //....   ctx.outgoingresponse.statuscode = system.net.httpstatuscode.expectationfailed;//417 //... 

if clearing cache doesn't help, it's related how urlmon wraps http error status codes; instance ie9 , below convert http/204 response bogus 1223 status code (see http://www.enhanceie.com/ie/bugs.asp)

this problem fixed in ie10 such server's response status correctly returned script.