Help setting up back navigation button by label name.

Newbie back for some gems of wisdom.

I am trying to get forward and back buttons to advance the user along the timeline by label name. I got the forward button to work, but can't seem to find the right code tweakage to get the back button to work.

Here is what I have:

stop();

var myLabels:Array = [ "A","B","C","D","E","F","G","H" ];

var nextLabel:String;

var inc:int = 1;

var prevLabel:String;

var inc2:int = -1;

fwdbtn.addEventListener(MouseEvent.CLICK, clickNextSection);

function clickNextSection(e:MouseEvent):void

{

    nextLabel = String(myLabels[inc]);

    gotoAndPlay(nextLabel);

    inc++;

}

bkbtn.addEventListener(MouseEvent.CLICK, clickPreviousSection);

function clickPreviousSection(e:MouseEvent):void

{

    prevLabel = String(myLabels[inc2]);

    gotoAndPlay(prevLabel);

    inc2++;

}

I'm sure there are some reduncies and I know I'm missing the variable that tells the timeline to subtract positioning from the array.

Do I need to define a new array for the back button?

Any idea what I'm messing up??

Thanks!!