Mute functionality not working on SansungSmartTV

Mute functionality not working on SansungSmartTV

Mute functionality for my app is not working on the device(i.e., TV),But
working on the emulator-2.5 and partially working on the emulator-3.5(Here
partially means its silence the audio,But does not applying styles(i.e.,
BackgroundImage which resembles mute).
Importantly my app is rejected showing the reason 'mute doesn't silence
the audio',But its working in 2.5 emulator and partially working on
Emulator-3.5. How can i fix this error to publish my app
Regards chandu