Movieclip's Being a Pain in the...yeeaah

1 buttons


b_1.onRelease = function(){
loadmovie("b1.swf", content)
}

1 Movieclip

Its x = 0 y = 0

when i load the movie (witch has text that is x=0 y=0)
it moves the movie clip down and to the right…

can someone tell me why?