Default [Q] Question about Wasapi

I use the code in this topic as developer.nokia.com/community/wiki/Audio_recording_and_playback_options_in_Windows_Ph one .
Doing so:
Code:
Select Code
WasapiAudioComp.WasapiAudio Audio = new WasapiAudioComp.WasapiAudio();
Audio.SetAudioBytes(byteArray);
Audio.StartAudioRender();
Also, the timer is:
Code:
Select Code
Audio.Update();
In byteArray Wav load file, but it will only play once more and no sound comes. What could be the problem?