Unloading pages

hi

im doing an assignment and i have main page with several buttons(with sounds), when u click on them it takes u to another .swf file.

The problem is that i want the main page to unload when it takes u to another page. I have used a movieclip to load the .swf files, but it doesnt seem to unload and the main page is still in the background as i can hear the sounds from the buttons.

here is the code ive used if its any help:

on (release) {
loader.loadMovie(“contactus.swf”);
}

ive also tried this:

on (release) {
loader.unloadMovie(“home.swf”);
loader.loadMovie(“contactus.swf”);
}

would anyone be able to help me?

foxee