Loading movie clip at specific frame

hi,

i have a movie clip with 3 other movie clips inside it. what i want to do is reload the first movie clip at a specific frame after the 3rd clip has finished. I understand that if you want to go back to the main timeline its: _root.gotoAndPlay(X); but i cant seem to apply this to my situation, ie, movieClip1.gotoAndPlay(15); can anyone shed some light on this please

thanks.