Movieclip actions in flash mx

1

im using flash mx and i want a movie clip to go to a particular frame ( 3 ) the problem is the movieclip ation (onclipevent) dosentwork in flash mx, can sombody helkp me

2

When do you want it to go to another frame ?

3

on mouse down

4 
onPress = function() {
gotoAndStop(3);
}
5

or

onMouseDown = function() {
hitTest(_root._xmouse, _root._ymouse, true) ? gotoAndPlay(3) : gotoAndPlay(1);
}