Mybutton.enabled = true question

hi,

i have a main swf that is loading different swfs into a higher level. i don’t want the buttons on the main level still active so i am using:

mybutton.enabled = false;

here is some code…
work.onPress = function () {
loadMovie(“work.swf”, “container”);
container._x = 235 ;
container._y = 145 ;
ipa.enabled = false;
}

on the work.swf there is also a close button.
on(release) {
unloadMovie(_root.container);
}

how can i enable the buttons again on the main swf? i have tried the following but am not sure of the path back to the main swf.

on(release) {
unloadMovie(_root.container);
ipa.enabled = true;
}
on(release) {
unloadMovie(_root.container);
_root.ipa.enabled = true;
}

any help would be great.