Should be simple to answer: button on movie clip

programming flash
1

Help! I have a what should be a simple problem. I am relatively new to AS3. I am using the following code to return a value when a button is clicked. The buttons are located in a movie clip that has been put on the stage.

CODE:
//stops the movie clip from playing
movieClip2.stop()

//this will return the value of each button that is clicked
movieClip2.d0.index = 0
movieClip2.d1.index = 1
movieClip2.d2.index = 2
movieClip2.d3.index = 3

//this sets the answerClick function for each butoon
movieClip2.d0.addEventListener(MouseEvent.CLICK, answerClick)
movieClip2.d1.addEventListener(MouseEvent.CLICK, answerClick)
movieClip2.d2.addEventListener(MouseEvent.CLICK, answerClick)
movieClip2.d3.addEventListener(MouseEvent.CLICK, answerClick)

//this function will change once I can get the buttons to work once clicked
function answerClick( evt ) {
trace(“hilly billy”)
//myPushBox.x = myPushBox.x + 10
}

Currently when I test this code it gives me this error:
ReferenceError: Error #1056: Cannot create property index on flash.display.SimpleButton

Any help is greatly appreciated.

Thanks!