FLVPlayer stop when redirecting to another frame. AS3

Question

Hi
I am new in AS3, but now i have problem to stop plaing FLVPlayback.
In main time line i have first frame used for preloader and second for intro.
Frame 3 is first screen with videoand my MainMenu with buttons inside mc.
Now when I click on button it successfully redirect screen to next frame and load my page, but I still hear music from video.
I need to stop playing video when i redirect to frames 4, 5 ....28 where are pages frame by frame.
In MainMenu i use
import flash.events.MouseEvent;
import flash.display.MovieClip;
//menu Domov
function btnHome(event:MouseEvent):void
    (root as MovieClip).gotoAndPlay(4);
function btnOnas(event:MouseEvent):void
    (root as MovieClip).gotoAndPlay(5);
function btnBoard(event:MouseEvent):void
    (root as MovieClip).gotoAndPlay(6);
btnHome_btn.addEventListener (MouseEvent.CLICK, btnHome);
btnOnas_btn.addEventListener (MouseEvent.CLICK, btnOnas);
btnBoard_btn.addEventListener (MouseEvent.CLICK, btnBoard);
website have 24 pages than i don't copy next buttons.
sorry for my english.

Answer 1

First include the SoundMixer class:
import flash.media.SoundMixer;
Then to stop the sounds call the stopAll method:
SoundMixer.stopAll();