I'd like to send a Sysex message to a MIDI Port. Unfortunately there is no response at all when I send it. Sending regular MIDI messages (`ShortMessage`) works just fine, but as soon as I replace the `ShortMessage` with the `SysexMessage` things stop working.

```
MidiDevice midiIn = MidiSystem.getMidiDevice(midiDeviceList[NUMBER]);
Receiver rcvr = midiIn.getReceiver
byte[] clearMsg = {(byte) 0xf0, 0x47, 0x7f, 0x15, 0x1e, 0x00, 0x00, (byte) 0xf7 };

SysexMessage sysMsg = new SysexMessage();    
sysMsg.setMessage(clearMsg, clearMsg.length);

rcvr.send(sysMsg, -1);

```

Why doesn't the port receive the message or why isn't it being sent?