Problem with AS3 for image gallery

What I am trying do is the following:
I have 5 pages of thumbnails across the bottom of each page with a large space at the top to show the larger image of each thumbnail. Now I had coded all the thumbnails as follows:

btn2.addEventListener(MouseEvent.CLICK,play4);

function play4(event:MouseEvent):void{
gotoAndStop(“2Lrg”);
}

btn4.addEventListener(MouseEvent.CLICK,play5);

function play5(event:MouseEvent):void{
gotoAndStop(“4Lrg”);
}

btn5.addEventListener(MouseEvent.CLICK,play6);

function play6(event:MouseEvent):void{
gotoAndStop(“5Lrg”);
}

btn6.addEventListener(MouseEvent.CLICK,play7);

function play7(event:MouseEvent):void{
gotoAndStop(“6Lrg”);
}

and so on, you get the picture, anyway this was all working fine and the thumbnails were opening the larger images in top area of page as wanted but, and here is the problem, I also have side navigation to go to each
separate page of the gallery and when I code these buttons as follows:

bowls_btn.addEventListener(MouseEvent.CLICK,play3) ;

function play3(event:MouseEvent):void{
gotoAndStop(“1Lrg”);
}

boxes_btn.addEventListener(MouseEvent.CLICK,play27 );

function play27(event:MouseEvent):void{
gotoAndStop(“25Lrg”);
}

it ends up screwing up the other buttons, I have been working on this for days now and tried everything I can think of to solve this problem (I am not a coder) as you might have guessed but I never had any of these problems when using mx4.

Again any help would be greatly appreciated as I am on a deadline!