Please need help w/ a close/exit button on external swf

I will give you a general idea of how the site is and where my problem is. I have a main stage where all the animation and buttons are displayed. I also have a border area w/ some text etc. and not really much going on. When a button is clicked, i have an external swf file play on top of the main stage area and it works fine. The swf is played and you can still see the border. However my problem is that i need to create a button that will close the external swf movie file that is playing over my main stage area on the main swf movie. Can anyone help?