Movie Clip Button - PLEASE HELP!

programming flash
1

I have a movie clip that I want to act as a button. All the states (on, over, etc) all work properly with the following code in the main timeline:

this.portfolio_button.onRollOver = function () {
portfolio_button.gotoAndPlay("_over");
}

this.portfolio_button.onRollOut = function () {
portfolio_button.gotoAndPlay("_out");
}

The problem is that I cannot get this ‘movie clip button’ to goto and play a frame…
This is the code I’m using for that:

on (release) {
gotoAndPlay(“Label”);
}

I’ve even tried to place a button inside the movie clip button and placed this code on it:
on (release) {
_root.gotoAndStop(“Label”);
}

Can somebody please let me know what I’m doing wrong?

Thanks in advance.