Problem in playing and stopping mp3(music)

in my game there are two labels, the “menu” label and the “game” label.
i want to have one mp3(song) playing during the “menu” label and another (song) playing during the “game”.
So,while the player is in the “menu”, if he clicks the “play” button the mp3(of the menu) must stop and the mp3(of the game) must begin.
i have tried putting the command “stop all sounds” in “play” button’s function, but it doesn’t only stop the music that was being played (menu’s mp3) but also the music that follows (game’s mp3) .

your help will be very important!!
thank you very much :hangover: