Using Scripter to make sustain pedal play the last note

I am trying to get my sustain pedal to play the last note. My script seems to work but where it fails is:

1. I press my sustain pedal to play the last note
2. I press another key while holding the sustain pedal
3. the note pressed from step 1 won't release until I turn off the input in the channel.

Any suggestions are appreciated! Below is my code:

// Define a variable to store the last played note
var lastNote = null;
function HandleMIDI(event)
{
	var note = new NoteOn;
    if (event instanceof NoteOn) {
        // Store the note in the variable
        lastNote = event.pitch;
    }
	if (event instanceof ControlChange && event.number==64) {
		// we received a sustain pedal message, convert it to a note
		note.channel=1;	// channel 1
		note.pitch=lastNote;		// kick drum
		if (event.value>0) note.velocity=100; else note.velocity=0;		// lock velocity at 100
		note.send();			// send it	
 	} else {
 		// send all other MIDI messages through untouched
		event.trace();
		event.send();
	}
}