#Help MediaPlayer doesn't run and still give an error

MediaPlayer issue,
when I run MediaPlayer in andorid there is an error:

E/ExtMediaPlayer-JNI: env->IsInstanceOf fails
E/MediaPlayer-JNI: JNIMediaPlayerFactory: bIsQCMediaPlayerPresent 0

the code:
player = MediaPlayer.create(this, R.raw.jalazone);
player.setLooping(false);
player.start();

any help, please