Unload swf

I am new in flash. There is a movie clip on the main timeline. I am loading one external “swf” by giving on “Release” action on the main timeline ( referrring the instance name of the “movie clip”) and trying to unload the "swf "after loading the same on level “1”. but cannot do the same.

After releasing the movie clip I am getting the desired the effect. But when clicking outside I am not getting the effect.