Loading swf's inside swf's question

I have four swfs. 1. ‘main’ 2. ‘anim’ 3. ‘1st’. 4.‘menu1’

  1. main.swf the first one. with jus a background image. & a movie clip with the instance name ‘contents’. with this script…

stop();
_root.contents.loadMovie(“anim.swf”);

anim.swf. loads on that ‘main’.

  1. “anim.swf”

now on in anim. there is a button, i want the button to take the user to, or load ‘1st.swf’ i used this…

on (release) {
loadMovie(“1st.swf”, _root.contents);
}

3.1st.swf

  1. Menu1.swf…now i want a button inside 1st. swf to take the user to Menu1.swf.

i tried using…

on (release) {
loadMovie(“menu1.swf”, _root.contents);
}

but it did not work? any ideas? also what code could i use for a back button?? thanks

marc