Flash :: Get Button In Movieclip To Go To Another Frame Inside The Same Movie Clip

I have several website pages set up on different frames inside the content (which is a movieclip) of the home page - which is on frame 1 of the main timeline. The content movieclip name is contentMc.

My About page is at frame 10. There is a button on this page (called btnAbout_contactpg) that I want to make jump to my Contact page (frame 50) - all of which is nested under the main contentMc movieclip.

This is the pathway on my contentMc (where all of my pages are located), just in case that doesn't make sense: [URL]

I have looked at several different instructions online, but none of them seem to work.

EDIT:

I am also trying to get a button on my gallery page to load an external image, but it is not recognizing where the button is either:

btnGallery_1.addEventListener (MouseEvent.CLICK, showPic1);
function showPic1 (e:MouseEvent) {
var target:Object=e.target;
var parent=target.parent;
my_loader.load(new URLRequest("image-0.jpg"));
}