Buttons after stop(); wont work; how can I FIX this

Question

Buttons after stop code (vidPlayer.stop();) wont work.
I figured out the stop code needed to stop my videos from playing when you click another button, but with my stop code being on top of my "gotandStop("label")" my buttons doesn't perform that function. I take the vidPlayer.stop(); off the buttons the buttons work fine, but then my videos wont stop playing when I click another button.  Help, how I can get my buttons back working and still stop my videos from continuely playing when another button is clicked.
Below is my code:
btn3.addEventListener (MouseEvent.Click, clickHandler3);
function clickHandler3 (e:MouseEvent):void{
     vidPlayer.stop();
     gotoAndStop ("services");
With the code exactly the way it is; when I like on the services button it wont work (unles I start from  the about btn, which houses the vidPlayer) I want to beable to go into my website and click any button and it work, not go to the about button first an then to any other button.  Please HELP BE ON THIS SAME PROBLEM FOR WEEKS.  IAM A BEGINNER ASWHILE SO DUMB IT DOWN PLEASE.

Answer 1

make sure vidPlayer is declared in frame 1 of your main timeline:
var vidPlayer:<class>;  // use the correct class here.  for example, FLVPlayback
you can then use:
btn3.addEventListener (MouseEvent.Click, clickHandler3);
function clickHandler3 (e:MouseEvent):void{
if(vidPlayer!=null){
     vidPlayer.stop();
     gotoAndStop ("services");