Really Simple Question

This is a really simple one, i have done it before but i don’t know how i did it.

I have a set of 7 buttons. When i press a button i want it to go to a specific frame and play. For example:

Button 1 Actionscript

on (release) {
_root.sub_mov.gotoAndPlay(1);

}

However, if I press a button twice it does not go to the specifc frame the second time. It just plays to the next frame in the sub_mov timeline?

How to i get it to play the specified frame everytime?

Thanks in advance!:-\