Simple play(); problem

Question

Go easy on me. I'm very new to ActionScript.
My problem is this. I've got a button inside a movie clip.
That button needs to play a movie clip that is on the main
timeline. However, whatever I try (that's within my knowledge)
doesn't work.
Here is a list of AS that I've got in my file.
Main timeline/first frame stop();
Movie clip end of animation has:
this.stop();
play_btn.addEventListener(MouseEvent.CLICK, slideOver);
function slideOver(event:MouseEvent):void {
timeline.play();
Movie clip that needs to be controlled:
first frame has this.stop();
last frame has:
this.stop();
and code to include a text file (which is working just fine).
Any ideas?

Answer 1

Well I'm not really sure why it doesn't work, but if you take
away this code from the first movie clip (the one with the button
in it):
play_btn.addEventListener(MouseEvent.CLICK, slideOver);
function slideOver(event:MouseEvent):void {
timeline.play();
and add this to the main timeline like this:
stop();
my_mc.play_btn.addEventListener(MouseEvent.CLICK, slideOver);
function slideOver(event:MouseEvent):void {
secondMovieClip.play();
than it should work.