MidiSystem.getSequencer() exception

[ksemeks]

Hi, so this is what is up.
I've keep having an exception thrown, on and on.
When i try to make a new Sequencer object, i keep getting the javax.sound.midi.MidiUnavailableException: Audio Device Unavailable exception.
So, here's the code:

import javax.sound.midi.*;

public class MiniMusicPlayer1
{
	public static void main(String[] args)
	{
		try
		{
			Sequencer sequencer = MidiSystem.getSequencer();
			sequencer.open();
			
			Sequence seq = new Sequence(Sequence.PPQ, 4);
			Track track = seq.createTrack();
			
			for (int i = 5; i < 61; i += 4)
			{
				track.add(makeEvent(144, 1, i, 100, i));
				track.add(makeEvent(128, 1, i, 100, (i+2)));
			}
			
			sequencer.setSequence(seq);
			sequencer.setTempoInBPM(220);
			sequencer.start();			
		}
		catch (Exception e)
		{
			e.printStackTrace();
		}
	}
	
	public static MidiEvent makeEvent(int comd, int chan, int one, int two, int tick)
	{
		MidiEvent event = null;
		{
			try
			{
				ShortMessage a = new ShortMessage();
				a.setMessage(comd, chan, one, two);
				event = new MidiEvent(a, tick);
			}
			catch (Exception e)
			{
				e.printStackTrace();
			}
		}
		
		return event;
	}
}

And here's the complete error (at compile):

javax.sound.midi.MidiUnavailableException: Audio Device Unavailable
	at com.sun.media.sound.MixerSynth.implOpen(MixerSynth.java:165)
	at com.sun.media.sound.AbstractMidiDevice.doOpen(AbstractMidiDevice.java:144)
	at com.sun.media.sound.AbstractMidiDevice.openInternal(AbstractMidiDevice.java:134)
	at com.sun.media.sound.AbstractMidiDevice.getReceiverReferenceCounting(AbstractMidiDevice.java:339)
	at javax.sound.midi.MidiSystem.getReceiver(MidiSystem.java:243)
	at javax.sound.midi.MidiSystem.getSequencer(MidiSystem.java:442)
	at javax.sound.midi.MidiSystem.getSequencer(MidiSystem.java:348)
	at MiniMusicPlayer1.main(MiniMusicPlayer1.java:9)

First i was unable to play MIDI files on my pc, but then i got it to work, so now i can play MIDI files, that's okay.
I tried even to close every process which uses my sound card, but the error is still there.
Anyone can help me?

[ksemeks]

Anyone ?