since ur using a gotoAndPlay, onEnterFrame will make it act like a gotoAndStop, because it will be repeatedly going to that frame, just remove the functions all together, change
PHP Code:
onRollOver = function(){
effect.gotoAndPlay(2);
sizeTo = 130;
}
//revert to 100% size when mouse cursor is out
onRollOut = function(){
sizeTo = 100;
}
to
PHP Code:
effect.gotoAndPlay(2);
sizeTo = 130;
if you want a way to change the size back, its going to have to be something other than rollOut, because you wont have a rollOver