c# - Exception HRESULT: 0x800455BC in speech recognition in Windows phone 8 -

i developing new app using speech recognition capability windows phone 8. however, getting following exception:

exception hresult: 0x800455bc

at system.runtime.compilerservices.taskawaiter.throwfornonsuccess(task task) @ system.runtime.compilerservices.taskawaiter.handlenonsuccessanddebuggernotification(task task) @ system.runtime.compilerservices.taskawaiter`1.getresult() @ excercisemod7voice.mainpage.d__4.movenext()

and code i'm trying use:

 private async void btnspeak_click(object sender, routedeventargs e)  {          var recognizer = new speechrecognizerui();          recognizer.settings.showconfirmation = true;          recognizer.settings.readoutenabled = false;           try          {              var result = await recognizer.recognizewithuiasync();              if (result.resultstatus == speechrecognitionuistatus.succeeded)              {                  messagebox.show(result.recognitionresult.text);              }          }          catch (exception ex)          {              messagebox.show(ex.message);          }  } 

when run app , click in button speak displays message confirmation few seconds , disappears.

note: i'm testing directly cellphone app. (nokia lumia 920)

that error message means language isn't supported. i'm not sure language settings can recognizer locale using (swap en-gb culture want)

var localrec = installedspeechrecognizers.all                        .where(r => r.language == "en-gb").firstordefault(); 

then set recognizer language

if(localrec != null)   recognizer.recognizer.setrecognizer(localrec); else   messagebox.show("recognizer language not found"); 

if don't explicitly set locale above system use language set in phone's speech settings.