Android : Why is musicSrv null?

Server connection:

    private ServiceConnection musicConnection = new ServiceConnection(){

    @Override
    public void onServiceConnected(ComponentName name, IBinder service) {
        MusicBinder binder = (MusicBinder)service;
        //get service
        musicSrv = binder.getService();
        Log.i("Test",binder.getService().toString());
        //pass list
        musicSrv.setList(songList);
        musicBound = true;
    }

    @Override
    public void onServiceDisconnected(ComponentName name) {
        musicBound = false;
    }
};

Where I get an error:

    public void songPicked(View view){
    musicSrv.setSong(Integer.parseInt(view.getTag().toString()));
    musicSrv.playSong();
    Log.d("Item clicked","Song picked"+Integer.parseInt(view.getTag().toString()));
    if(playbackPaused){
        setController();
        playbackPaused=false;
    }
    controller.show(0);
}

MusicService.java

    package com.musicplayer;

    import android.app.Service;
    import android.content.ComponentName;
    import android.content.Intent;
    import android.content.ServiceConnection;
    import android.media.MediaPlayer;
    import android.os.IBinder;

    import java.util.ArrayList;
    import android.content.ContentUris;
    import android.media.AudioManager;
    import android.media.MediaPlayer;
    import android.net.Uri;
    import android.os.Binder;
    import android.os.PowerManager;
    import android.util.Log;

    import java.util.Random;
    import android.app.Notification;
    import android.app.PendingIntent;

    import com.lyricscloud.R;

    public class MusicService extends Service implements
    MediaPlayer.OnPreparedListener, MediaPlayer.OnErrorListener,
    MediaPlayer.OnCompletionListener {

//media player
private MediaPlayer player;
//song list
private ArrayList<Song> songs;
//current position
private int songPosn;

private String songTitle="";
private static final int NOTIFY_ID=1;


private final IBinder musicBind = new MusicBinder();
public void setList(ArrayList<Song> theSongs){
    songs=theSongs;
}

public class MusicBinder extends Binder {
    MusicService getService() {
        return MusicService.this;
    }
}

public void initMusicPlayer(){
    player.setWakeMode(getApplicationContext(),
            PowerManager.PARTIAL_WAKE_LOCK);
    player.setAudioStreamType(AudioManager.STREAM_MUSIC);
    player.setOnPreparedListener(this);
    player.setOnCompletionListener(this);
    player.setOnErrorListener(this);
}

public void onCreate(){
    super.onCreate();
    //initialize position
    songPosn=0;
    //create Player
    player = new MediaPlayer();
    initMusicPlayer();


}
@Override
public void onDestroy() {
    stopForeground(true);
}


public void playSong(){
    player.reset();
    Song playSong = songs.get(songPosn);
    songTitle=playSong.getTitle();
    //get id
    long currSong = playSong.getID();
    //set uri
    Uri trackUri = ContentUris.withAppendedId(
            android.provider.MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
            currSong);
    try{
        player.setDataSource(getApplicationContext(), trackUri);
    }
    catch(Exception e){
        Log.e("MUSIC SERVICE", "Error setting data source", e);
    }
    player.prepareAsync();

}


@Override
public boolean onUnbind(Intent intent){
    player.stop();
    player.release();
    return false;
}

@Override
public IBinder onBind(Intent intent) {
    return musicBind;
}

public void onCompletion(MediaPlayer mp) {
    if(player.getCurrentPosition() <= 0){
        mp.reset();
        playNext();
    }
}
public int getPosn(){
    return player.getCurrentPosition();
}

public int getDur(){
    return player.getDuration();
}

public boolean isPng(){
    return player.isPlaying();
}

public void pausePlayer(){
    player.pause();
}

public void seek(int posn){
    player.seekTo(posn);
}

public void go(){
    player.start();
}

public void playPrev(){
    songPosn--;
    if(songPosn <= 0) songPosn=songs.size()-1;
    playSong();
}

public void playNext(){
    songPosn++;
    if(songPosn >= songs.size()) songPosn=0;
    playSong();
}


@Override
public boolean onError(MediaPlayer mp, int what, int extra) {
    mp.reset();
    return false;
}

public void setSong(int songIndex){
    songPosn=songIndex;
    Log.d("Service", ""+songIndex);
}

@Override
public void onPrepared(MediaPlayer mp) {
    mp.start();
    Intent notIntent = new Intent(this, MusicPlayer_Songs.class);
    notIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    PendingIntent pendInt = PendingIntent.getActivity(this, 0,
            notIntent, PendingIntent.FLAG_UPDATE_CURRENT);

    Notification.Builder builder = new Notification.Builder(this);

    builder.setContentIntent(pendInt)
            .setTicker(songTitle)
            .setOngoing(true)
            .setContentTitle("Playing");
    builder.setContentText(songTitle);
    Notification not = builder.build();

    startForeground(NOTIFY_ID, not);
}
}

The error

08-04 22:50:31.796  23825-23825/com.lyricscloud.dev E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.lyricscloud.dev, PID: 23825
    java.lang.NullPointerException
            at com.musicplayer.MusicPlayer_Songs.songPicked(MusicPlayer_Songs.java:47)
            at com.musicplayer.MusicPlayer_Songs$3.onItemClick(MusicPlayer_Songs.java:117)
            at android.widget.AdapterView.performItemClick(AdapterView.java:308)
            at android.widget.AbsListView.performItemClick(AbsListView.java:1478)
            at android.widget.AbsListView$PerformClick.run(AbsListView.java:3480)
            at android.widget.AbsListView$3.run(AbsListView.java:4823)
            at android.os.Handler.handleCallback(Handler.java:733)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:157)
            at android.app.ActivityThread.main(ActivityThread.java:5356)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
            at dalvik.system.NativeStart.main(Native Method)

I'm not sure whats causing it, I need help please, the app is a musicplayer and whenever I click a list item it gives me that error