external movie level

hi,
i have made 1 file named menu. there are 2 menu clips, left and right.
inside each MC, there are buttons. each button contains the following code:

on (release) {
this.swapDepths(1);
this.createEmptyMovieClip("target_mc1", this.getNextHighestDepth());
target_mc1._x = -600;
target_mc1._y = -150;
target_mc1.loadMovie("1.swf");
}

the problem im facing is the external movie loads on the top of the right menu, the left menu is still on the top of that external movie.

anyone can help plz?

Regards