gotoAndStop not working

this has been happening for a while now and i really don’t know why. I have made a simple game with 4 frames, the start page, the game, player 1 winner screen, and player 2 winner screen. If the on the winning screens i have a button to go back to the start screen but they don’t work, the start screen just flashes on then goes back to the winning screen. Does anyone know why this is happening? the fla is here: http://www.freewebs.com/pdandtcos/multiplayer%20game.fla