Checkbox and button as3

1

Hello

I have found a checkbox code that assign value once the check box is ticked see code bellow but i want to add a button to move to next frame but it will not work, i am not too sure why see code below

any help must be simple

the checkbox code
import fl.controls.CheckBox;
cart_txt.text = “Your Shopping Cart Contains:”;

var checkbox1 = new CheckBox();
var checkbox2 = new CheckBox();

checkbox1.addEventListener(MouseEvent.CLICK, updateList);
checkbox2.addEventListener(MouseEvent.CLICK, updateList);

checkbox1.label = “Milk”;
checkbox2.label = “Bread”;
checkbox1.x = 80;
checkbox1.y = 60;
checkbox2.x = 80;
checkbox2.y = 80;
addChild(checkbox1);
addChild(checkbox2);

function updateList (event:MouseEvent):void {

cart_txt.text = "Your Shopping Cart Contains:

";
if (checkbox1.selected == true) cart_txt.appendText(checkbox1.label + "
");
if (checkbox2.selected == true) cart_txt.appendText(checkbox2.label + "
");
}

**my button code: **

function myStart1(event:MouseEvent):void {
gotoAndStop(“sentences1”);
}
next1_btn.addEventListener(MouseEvent.CLICK, myStart1);

thanks

xav