[F8] whaaat..? onMotionFinished just stopped working? or am i blind and miss the bug?

[mrk13]

hi!
now this may seem a silly supernoob problem, but i've used this command a thousand and two times. now it suddenly stopped working. It's an onMotionFinished function, code below. i've included a fla for you to take a look. never mind about the clumsy graphics, i stumbled into this problem before i even got started with the site. if i don't get it right, i never get further. pleeeeeease help, i'm really puzzled with this one!

stop();
myTween = new mx.transitions.Tween(boy, "_xscale", easeType, 44, 100, 65);
myTween = new mx.transitions.Tween(boy, "_yscale", easeType, 44, 100, 65);
myTween = new mx.transitions.Tween(boy, "_x", easeType, 77, 199, 65);
myTween = new mx.transitions.Tween(boy, "_y", easeType, 138, 125, 65);
myTween.onMotionFinished=function(){
	gotoAndStop("turn");
	boy.gotoAndStop("boystop");
}

code explanation: i have this mc with an instance name boy. after the tween, the walking boy comes to a halt (frame called boystop in boy_mc), and then i basically wish the main timeline move forward. in this example to a frame called "turn". the problem: boy halts ok but main timeline never moves forward.