Why doesn't my buttons work?

Question

I have a perculiar situation here, usually I have no problems with this.

The situation is like this, I have 4 screens. A game screen, a menu and a win screen and a death screen.

the situation is that the buttons that allow my player to go from the win screen to the menu is not working. I traced it and the button is working, it just doesn't move the frames.

here are the codes I used.

    public function prototype() {

    }
    public function startMenu() {
        btnStart.addEventListener(MouseEvent.CLICK, gotoGame);
    }
    public function gotoGame(evt: MouseEvent): void {
        btnStart.removeEventListener(MouseEvent.CLICK, gotoGame);
        gotoAndStop("game1");
    }
    public function gotoGameA(evt: MouseEvent): void {
        btnContinue.removeEventListener(MouseEvent.CLICK, gotoGameA);
        btnMenu.removeEventListener(MouseEvent.CLICK, gotoFront);
        gotoAndStop("game1");
    }
    public function gotoWin() {
        gotoAndStop("win");
        startWin()
    }
    public function startWin() {
        btnContinue.addEventListener(MouseEvent.CLICK, gotoGameA);
        btnMenu.addEventListener(MouseEvent.CLICK, gotoFront);
    }
    public function gotoFront(evt: MouseEvent): void {
        trace("please work")
        gotoAndStop("menu");
        startMenu();
    }
    public function gotoDeath() {
        gotoAndPlay("death");
    }

I am not sure what to do with this.

Timeline:

Answer 1

public function startMenu() {
            btnStart.addEventListener(MouseEvent.CLICK, gotoGame);
        }

        private function gotoGame(evt: MouseEvent) {
            btnStart.removeEventListener(MouseEvent.CLICK, gotoGame);
            gotoAndStop("game1");
        }
        private function gotoGameA(evt: MouseEvent) {
            btnContinue.removeEventListener(MouseEvent.CLICK, gotoGame);
            btnMenuA.removeEventListener(MouseEvent.CLICK, gotoMenu);
            gotoAndStop("game1");
        }
        public function startGameWin() {
            btnMenuA.addEventListener(MouseEvent.CLICK, gotoMenu);
            btnContinue.addEventListener(MouseEvent.CLICK, gotoGameA);
        }

        public function startGameOver() {
            btnMenuB.addEventListener(MouseEvent.CLICK, gotoMenuA);
        }

        private function gotoMenu(evt: MouseEvent) {
            trace("hit")
            btnMenuA.removeEventListener(MouseEvent.CLICK, gotoMenu);
            btnContinue.removeEventListener(MouseEvent.CLICK, gotoGame);
            gotoAndStop("game1");
            gotoAndStop("menu");
        }
        private function gotoMenuA(evt: MouseEvent) {
            trace("hit")
            btnMenuB.removeEventListener(MouseEvent.CLICK, gotoMenuA);
            gotoAndStop("game1");
            gotoAndStop("menu");
        }