tellTarget to play a movie clip within a movie clip

I currently have two movie clips in my scene with a button that lies inside one of the movie clips. We will call this movie clip for the sake of this post “ph.” The button inside of ph has a rollOver/rollOut movie clip called “Buick_rollOut” attached to it as a parked movie clip through tellTarget. Currently Buick_rollOut only works if I put the parked movie clip on the same level as ph. I want Buick_rollOut to be within the movie clip, ph, that contains the button. I want that button be able to tellTarget the location of Buick_rollOut within ph. I hope this makes sense. Here is my code for the button that lies within ph. (this code only works when Buick_rollOut is located outside of ph on the same level).

on (rollOver) {
tellTarget ("/Buick_rollOut") {
gotoAndPlay (“rollOver”);
}
}
on (rollOut) {
tellTarget ("/Buick_rollOut") {
gotoAndPlay (“rollOut”);
}
}