Problems with Next and Back Buttons ActionScript 3.0

Question

Hi,
I have set up a Back, Play and Next buttons in a slideshow I am making.  The next and back buttons work correctly until it gets to the end. 
If I press the Next button it goes back to what appears to be Frame 1 and will not go to the next slide. If I press the Back button it will then go to Frame 201 and If I press next again it will go to Frame 1.  It will only go back and forth in between those frames.
If I press the Back button from the beginning it goes through the slide show correctly then it gets stuck at Frame 1.  If I press next button it goes to Frame 121 and gets stuck in between 121 and 1.
I can't figure this out please help.
My code on Frame 1 is:
stop();
play_btn.addEventListener(MouseEvent.CLICK,playslideshow);
function playslideshow(event:MouseEvent) { gotoAndPlay(2); }
forward_btn.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndStopAtFrame_2);
function fl_ClickToGoToAndStopAtFrame_2(event:MouseEvent):void
  gotoAndStop(40);
back_btn.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndStopAtFrame_8);
function fl_ClickToGoToAndStopAtFrame_8(event:MouseEvent):void
  gotoAndStop(281);
My code on Frame 40 is:
forward_btn.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndStopAtFrame_7);
function fl_ClickToGoToAndStopAtFrame_7(event:MouseEvent):void
  gotoAndStop(121);
back_btn.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndStopAtFrame_9);
function fl_ClickToGoToAndStopAtFrame_9(event:MouseEvent):void
  gotoAndStop(1);
My code on Frame 121 is:
forward_btn.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndStopAtFrame_3);
function fl_ClickToGoToAndStopAtFrame_3(event:MouseEvent):void
  gotoAndStop(201);
back_btn.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndStopAtFrame_10);
function fl_ClickToGoToAndStopAtFrame_10(event:MouseEvent):void
  gotoAndStop(40);
My code on Frame 201 is:
forward_btn.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndStopAtFrame_4);
function fl_ClickToGoToAndStopAtFrame_4(event:MouseEvent):void
  gotoAndStop(281);
back_btn.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndStopAtFrame_11);
function fl_ClickToGoToAndStopAtFrame_11(event:MouseEvent):void
  gotoAndStop(121);
My code on Frame 281 is:
forward_btn.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndStopAtFrame_5);
function fl_ClickToGoToAndStopAtFrame_5(event:MouseEvent):void
  gotoAndStop(1);
back_btn.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndStopAtFrame_12);
function fl_ClickToGoToAndStopAtFrame_12(event:MouseEvent):void
  gotoAndStop(201);

Answer 1

I found the solution!  Flash CS5 Tutorial 6 Click On Button Go To Another Frame.avi - YouTube
I had to Convert to Keyframes each frames I wanted to jump to on the buttons layer.  Then highlight the button and give each another instance name! Like forward1_btn, forward2_btn, back1_btn, back2_btn...  I did that and adjusted the action-script for each button.
Frame 1
stop();
play_btn.addEventListener(MouseEvent.CLICK,playslideshow);
function playslideshow(event:MouseEvent)
gotoAndPlay(2);
forward1_btn.addEventListener(MouseEvent.CLICK, Shoot_1);
function Shoot_1(event:MouseEvent):void
  gotoAndStop(40);
back1_btn.addEventListener(MouseEvent.CLICK, Back_1);
function Back_1(event:MouseEvent):void
  gotoAndStop(281);
Frame 40
forward2_btn.addEventListener(MouseEvent.CLICK, Shoot_2);
function Shoot_2(event:MouseEvent):void
  gotoAndStop(121);
back5_btn.addEventListener(MouseEvent.CLICK, Back_5);
function Back_5(event:MouseEvent):void
  gotoAndStop(1);
And so on...