Loading sound file from raw folder

Question

I'm having trouble playing sounds with my android device, I have tried to use MediaPlayer:

final MediaPlayer mp1 = MediaPlayer.create(this, R.raw.beep1);
mp1.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
    @Override
    public void onCompletion(MediaPlayer mp) { mp.release(); }
});
btn1.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        soundPool.play(sound, 1.0f, 1.0f, 0, 0, 1.0f);
        mp1.start();
    }
});

Which got the error:

11-25 00:16:24.803: E/AudioFlinger(134): no more track names available
11-25 00:16:24.803: E/AudioTrack(134): AudioFlinger could not create track, status: -12
11-25 00:16:24.803: E/AudioSink(134): Unable to create audio track
11-25 00:16:24.803: E/MediaPlayer(2538): error (-19, 0)
11-25 00:16:24.813: E/MediaPlayer(2538): Error (-19,0)

I also tried using SoundPool:

final SoundPool soundPool = new SoundPool(1, AudioManager.STREAM_MUSIC, 0);
final int sound = soundPool.load(this, R.raw.beep1, 1);
btn1.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        soundPool.play(sound, 1.0f, 1.0f, 0, 0, 1.0f);
        mp1.start();
    }
});

Which has similar output:

11-25 00:29:12.163: E/AudioFlinger(134): no more track names available
11-25 00:29:12.163: E/AudioTrack(3355): AudioFlinger could not create track, status: -12
11-25 00:29:12.163: E/SoundPool(3355): Error creating AudioTrack

Am I doing anything wrong with specifying the resouce? I have not declared it anywhere (this code is all that is related to sounds), because I have not seen it mentioned anywhere.

The file beep1.wav is located in res/raw (I created the folder manually and pasted the file there).

EDIT: the full code:

public class MainActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button btn1 = (Button)findViewById(R.id.sound_btn);
        final MediaPlayer mp1 = MediaPlayer.create(this, R.raw.beep1);
        setVolumeControlStream(AudioManager.STREAM_MUSIC);
        mp1.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
            @Override
            public void onCompletion(MediaPlayer mp) { 
                mp.release();
            }
        });
        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mp1.start();
            }
        });
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
}

Answer 1

The problem was with available space on the phone (I included two sound files, one of them was large (5MB) and after deleting it, the sound plays fine).