Another way to do the function over()

I am trying to have a MC be automated so that on RollOver and RollOut it will slide in, however I would like to also have some buttons within this MC and it seems once I add the AS the buttons within the MC no longer function. Is there another way to do this where a tab will slide in with buttons when the tab is hit by mouse?

My code on main time line is:


[LEFT]soundtab.onRollOver = over;
soundtab.onRollOut = out;

function over() {
 this.gotoAndPlay(2);
}
function out() {
 this.gotoAndPlay(15);
}[/LEFT]

When I add this handler it dis allows buttons within that movie clip. Any ideas help thanks
MT