Need help with ColorTransform

HELP!!

I'm trying to get a simple Tennis Court colorizer to work. I have 2 rows of buttons targeted to separate instances (inside court and outside court).

The rows of buttons color the instances the way they should, but not at the same time -- meaning; the top row colors the inside of the court, but when I click on any button in the bottom row, the outside of the court changes color correctly, but the inside of the court turns black.
Same thing happens in reverse. I need to be able to change colors on the inside and outside

I am a complete novice with Flash, but my client wanted this thing, and I'm trying to make it work. I've reverse engineered this from a nmber of sources, and trial and error. For the record, I have many (many) years of experience with Illustrator and Photoshop. Just don't use Flash, because I create usually static artwork for print.

I also need to have the color name appear above the button rows when a color is clicked.
Haven't gotten to that part yet.

Here's the page with the embedded .swf file:

http://www.jerryrussell.com/sandbox/TennisCourtColorizerCS6.html

Here's the Action Script:

// BUTTON ARRAYS with the instances of the buttons

var obtts:Array = [O_green1, O_green2, O_green3, O_blue1, O_blue2, O_tan, O_red];

var ibtts:Array = [I_green1, I_green2, I_green3, I_blue1, I_blue2, I_tan, I_red];

// sets an object with colors for each button

var set_outercolors:Object = {'O_green1':0x26822E, 'O_green2':0x1E592B, 'O_green3':0x104322, 'O_blue1':0x0665A4, 'O_blue2':0x023F5F, 'O_tan':0x766B4E, 'O_red':0x703730};

var set_innercolors:Object = {'I_green1':0x26822E, 'I_green2':0x1E592B, 'I_green3':0x104322, 'I_blue1':0x0665A4, 'I_blue2':0x023F5F, 'I_tan':0x766B4E, 'I_red':0x703730};

// sets a ColorTransform object

var oobj_color:ColorTransform = new ColorTransform();

var iobj_color:ColorTransform = new ColorTransform();

// traverse the "obtts" array with button instances

for(var o:int=0; o<obtts.length; o++) {

// set the color to each button

  oobj_color.color = set_outercolors[obtts.name];

  obtts.transform.colorTransform = oobj_color;

// register CLICK event for each button

  obtts.addEventListener(MouseEvent.CLICK, changeColor);

  ibtts.addEventListener(MouseEvent.CLICK, changeColor);

}

// traverse the "ibtts" array with button instances

for(var i:int=0; i<ibtts.length; i++) {

  // set the color to each button

  iobj_color.color = set_innercolors[ibtts.name];

  ibtts.transform.colorTransform = iobj_color;

// register CLICK event for each button

  ibtts.addEventListener(MouseEvent.CLICK, changeColor);

}

// function called by CLICK events

function changeColor(evt:Event):void

{

// get the instance name of the clicked button

  var b_name = evt.target.name;

// set and change the instance color

  oobj_color.color = set_outercolors[b_name];

  outer.transform.colorTransform = oobj_color;

  iobj_color.color = set_innercolors[b_name];

  inner.transform.colorTransform = iobj_color;

}