Buttons does not work

I have four buttons. Two will navigate to each end of the timeline in question. The other two will bring you one step further on the timeline in either direction. The buttons are called start_btn, end_btn, fram_btn and tilbake_btn. The instances are called start, end, fram and tilbake. There are two labels on the timeline, in the Labels layer, one called start, the other called end, at each end of the timeline in question. In addition to the code below, placed at frame number 2, I have a stop-code in the Actions layer at frame number 1 because, when the file is opened I want the movie to stop at this frame.

Here is the code placed in the Actions layer at frame number 2:

start.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndStopAtFrame_9);

function fl_ClickToGoToAndStopAtFrame_9(event:MouseEvent):void

{

  gotoAndStop("start");

}

tilbake.addEventListener(MouseEvent.CLICK, fl_ClickToGoToPreviousFrame_4);

function fl_ClickToGoToPreviousFrame_4(event:MouseEvent):void

{

  prevFrame();

}

fram.addEventListener(MouseEvent.CLICK, fl_ClickToGoToNextFrame_7);

function fl_ClickToGoToNextFrame_7(event:MouseEvent):void

{

  nextFrame();

}

end.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndStopAtFrame_10);

function fl_ClickToGoToAndStopAtFrame_10(event:MouseEvent):void

{

  gotoAndStop("end");

}

Many people will not download files thru the forum for a variety of good reasons.  If you show thw code that is not working and explain how your design fits into it you are more likely to get help.