Android unable to create mediaplayer

i play a sound with this code:

    mp = MediaPlayer.create(Start.this, R.raw.music);   
                mp.start();
                NameButton.setEnabled(false);
                mp.setOnCompletionListener(new OnCompletionListener() {

                    @Override
                    public void onCompletion(MediaPlayer mp) {

                        mp.release();
                        NameButton.setEnabled(true);
                    }

                });

It plays well. I modified the length of the file with Audacity, and now eclipse and my phone force closes.

06-05 07:16:20.106: ERROR/MediaPlayer(427): Unable to to create media player
06-05 07:16:20.126: DEBUG/MediaPlayer(427): create failed:
06-05 07:16:20.126: DEBUG/MediaPlayer(427): java.io.IOException: setDataSourceFD failed.: status=0x80000000
06-05 07:16:20.126: DEBUG/MediaPlayer(427):     at android.media.MediaPlayer.setDataSource(Native Method)
06-05 07:16:20.126: DEBUG/MediaPlayer(427):     at android.media.MediaPlayer.create(MediaPlayer.java:645)
06-05 07:16:20.126: DEBUG/MediaPlayer(427):     at com.bfarago.clickme.Start$1.onClick(Start.java:108)
06-05 07:16:20.126: DEBUG/MediaPlayer(427):     at android.view.View.performClick(View.java:2408)
06-05 07:16:20.126: DEBUG/MediaPlayer(427):     at android.view.View$PerformClick.run(View.java:8816)
06-05 07:16:20.126: DEBUG/MediaPlayer(427):     at android.os.Handler.handleCallback(Handler.java:587)
06-05 07:16:20.126: DEBUG/MediaPlayer(427):     at android.os.Handler.dispatchMessage(Handler.java:92)
06-05 07:16:20.126: DEBUG/MediaPlayer(427):     at android.os.Looper.loop(Looper.java:123)
06-05 07:16:20.126: DEBUG/MediaPlayer(427):     at android.app.ActivityThread.main(ActivityThread.java:4627)
06-05 07:16:20.126: DEBUG/MediaPlayer(427):     at java.lang.reflect.Method.invokeNative(Native Method)
06-05 07:16:20.126: DEBUG/MediaPlayer(427):     at java.lang.reflect.Method.invoke(Method.开发者_C百科java:521)
06-05 07:16:20.126: DEBUG/MediaPlayer(427):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
06-05 07:16:20.126: DEBUG/MediaPlayer(427):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
06-05 07:16:20.126: DEBUG/MediaPlayer(427):     at dalvik.system.NativeStart.main(Native Method)
06-05 07:16:20.126: DEBUG/AndroidRuntime(427): Shutting down VM

I don't know what the problem can be. Is it possible that Android cannot play very short sounds (it's like 1/10 sec now)?