Android : RemoteControlClient wear play/pause does not work

I am registering RemoteControlClient to control playback in my application. http://developer.android.com/reference/android/media/RemoteControlClient.html it shows playback notification on android wear, but buttons play/pause/next/prev does not work on wear, volume up/down work. It also work locally on phone, so i think remotecontrolclient is registered correctly. Does someone faced up with this problem too? Any advices?

Thanks,