Android Question Error on End Sub

[gerredtor]

Hello i become a error:

Error occurred on line: 17 (a)
java.io.IOException: setDataSource failed.
    at android.media.MediaPlayer.setDataSource(MediaPlayer.java)
    at android.media.MediaPlayer.setDataSource(MediaPlayer.java)
    at anywheresoftware.b4a.objects.MediaPlayerWrapper.loadAfterReset(MediaPlayerWrapper.java:96)
    at anywheresoftware.b4a.objects.MediaPlayerWrapper.Load(MediaPlayerWrapper.java:63)
    at b4a.example.weckjer.einschlaf._timer1_tick(einschlaf.java:265)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:703)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:337)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:247)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:134)
    at anywheresoftware.b4a.objects.Timer$TickTack.run(Timer.java:105)
    at android.os.Handler.handleCallback(Handler.java)
    at android.os.Handler.dispatchMessage(Handler.java)
    at android.os.Looper.loop(Looper.java)
    at android.app.ActivityThread.main(ActivityThread.java)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java)

my error code:

Sub Service_Create
    mp.Initialize
End Sub

this is line 17:

End Sub

 

[gerredtor]

Has just been released from alone