400 Bad Request when calling wcf webservice. Used to work - now fails -

i stumped. worked morning , 400 bad request error. haven't changed in web service nor have changed in tiny app use test web service. thing comes mind saw balloon pop earlier indicating there updates visualstudio 2012. i've been beating head against wall hours , making no progress. i've gone far shut down vs , restart , when didn't work rebooted. unschelved code had shelved @ end of last week , code gets 400 bad request error when test application tries call web service. can wsdl webservice running , responding. anyway, here code test app uses connect web service. guys see wrong? have ideas?

    private void button1_click(object sender, eventargs e)     {         var sr = new servicereference1.acordwebservice();          string outxml = file.readalltext(@"..\..\..\wcftester\order.xml");          webrequest request = webrequest.create(sr.url);         request.method = "post";         byte[] bytearray = getbytes(outxml);         request.contentlength = bytearray.length;         request.contenttype = "text/xml; charset=utf-8";         stream datastream = request.getrequeststream();         datastream.write(bytearray, 0, bytearray.length);         datastream.close();         webresponse response = request.getresponse();         using (stream stream = response.getresponsestream())         {             streamreader reader = new streamreader(stream, encoding.utf8);             respxml.text = reader.readtoend();         }     }