Removing movieclips problem

Im having abit of trouble using removeMovieclip();

i have a little map, calles “button_map”, that when pressed, the actual map appears
(heres the code on the button_map)

on(press){
_root.FirstB.attachMovie(“map”,“new_map”,17);
}

now, that works fine and it attaches my map where wanted. On my actual map, theres a button that says “close” on it, that when pressed should remove the map movie clip. butt i cant seen to get it to work.

any suggestions?