What's wrong with my advanced color script?

I'm working on a script that is an advaced version of the colornotes included with MuseScore. One where through a UI one chooses to have the notes colored or blackened.

The UI part seems to be working ok.. but none of the notes are getting colored.
The UI code (bbscolornotes.ui):

Dialog

0
0
363
300

Barbershop Color Notes

Qt::Vertical

20
20

10

Choose colorizing method

Qt::LogText

true

Qt::Vertical

20
20

color note head

true

black note head

Qt::Vertical

20
20

Qt::Horizontal

QDialogButtonBox::Cancel|QDialogButtonBox::Ok

buttonBox
accepted()
Dialog
accept()

248
254

157
274

buttonBox
rejected()
Dialog
reject()

316
260

286
274

and the regular script (bbscolornotes.js)

//=============================================================================
// MuseScore
// Linux Music Score Editor
// $Id:$
//
// Test plugin
//
// Copyright (C)2009 Werner Schweer and others
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//=============================================================================

var colors = [new QColor(0,0,0),new QColor(255,0,0),new QColor(0,255,0),
new QColor(0,0,255),new QColor(128,0,0),new QColor(255,0,128),
new QColor(0,128,0),new QColor(0,0,160),new QColor(0,113,187),
new QColor(94,80,161),new QColor(141,91,166),new QColor(207,62,150)];

//
// error handling is mostly omitted!
//

//---------------------------------------------------------
// init
//---------------------------------------------------------

function init()
{
};

var form;

//---------------------------------------------------------
// run
// create gui from qt designer generated file test4.ui
//---------------------------------------------------------

function run()
{
var loader = new QUiLoader(null);
var file = new QFile(pluginPath + "/bbscolornotes.ui");
file.open(QIODevice.OpenMode(QIODevice.ReadOnly, QIODevice.Text));
form = loader.load(file, null);
form.buttonBox.accepted.connect(accept);
form.show();
};

//---------------------------------------------------------
// removeNote
// from all chords with three notes remove note with
// index "idx"
//---------------------------------------------------------

function colorNote(idx)
{
var cursor = new Cursor(curScore);
for (var staff = 0; staff < curScore.staves; ++staff)
{
cursor.staff = staff;
for (var v = 0; v < 4; v++)
{
cursor.voice = v;
cursor.rewind(); // set cursor to first chord/rest
var chosenColor = 0;
if(idx < 1)
{
chosenColor = ((4 *staff) + v) % 12;
}

while (!cursor.eos())
{
if (cursor.isChord())
{
for (var i = 0; i < cursor.chord().notes(); i++)
{
var note = cursor.chord().note(i);
note.color = new QColor(colors[chosenColor]);
}
}
cursor.next();
}
}
}
};

//---------------------------------------------------------
// accept
// called when user presses "Accept" button
//---------------------------------------------------------

function accept()
{
var idx = -1;
if (form.colorHead.checked)
idx = 0;
else if (form.allBlack.checked)
idx = 1;
if (idx != -1)
colorNote(idx);
}

var mscorePlugin = {
menu: 'Plugins.BBS Color Notes',
init: init,
run: run
};

mscorePlugin;

The only thing I haven't checked is running dos2unix on the files before using in musescore.
When I use the debugger in musescore - it crashes when trying to access information to confirm the color value is applied,

I have individual versions that work fine to color and to black, but being identical scripts it would be nice to make them one.

Any help is appreciated.