Mc won't gotoAndPlay, but why not?

Just want to be able to to return to a certain frame but it won’t work and I really don’t know what I’m doing wrong. These are the codes I’m using:

on (click) {
	_root.intro_btn2.gotoAndPlay("instructions");
}

and this on the intro_btn2 mc:

on (press){
_root.gotoAndPlay ("step2");
}

Got the same code on another button and that works (frame label different of course…) but this one will not go to frame “step2”…anyone knows why?

wb