Loading movie clip to stage with button click AS3

Question

I'm trying to figure out how to load a movie clip to the stage with a button click and have the movieclip close again using a close button. Does anyone have a step by step on how to do this or links to some tutorials.
Below is an example of what I'm trying to do.

Answer 1

Alrighty I changed the publish settings to as3. I'm still getting two errors:
Scene 1
1046: Type was not found or was not a compile-time constant: Popup1Btn.
Scene 1, Layer 'as', Frame 1, Line 3
1061: Call to a possibly undefined method addEventListener through a reference with static type Class.
So my setup on my main timeline is I have an actionscript layer with this code now:
var popup1:Popup1
Popup1Btn.addEventListener(MouseEvent.CLICK,addF);
ClosePopup1.addEventListener(MouseEvent.CLICK,closeF);
function addF(e:MouseEvent):void{
popup1=new Popup1();
addChild(popup1);
function closeF(e:MouseEvent):void{
removeChild(popup1);
popup1=null;
On the stage I have a button with the isntance/AS linkage name Popup1Btn. Inside my Popup1 MC I have a box with text and then a button with the instance/linkage name ClosePopup1 to close the popup.
What am I missing?