I'm going nuts, I need help!

Ok, so this is driving me friggin insane, I have been working on this for way too long and can’t figure it out. I’m using CS3, but AS2, this is my dilemma;

I have a button inside a movie clip, and I am trying to target a frame in another movie clip, I am using this script;

my_mc2.my_btn.onRelease = function() {
mc1.gotoAndPlay(1);
};

It isn’t working. I have my buttons labeled, I have my MCs labeled. What the hell am I doing wrong, why oh why isn’t it targeting the frame in another movieclip. Nothing is happening, the button doesn’t call anything.
If anyone could maybe throw a test .fla together for me to show me, I would be forever in the shadow of your genius.