AS2 Classes

1

I am trying to make this class remove a dynamic Movieclip that was attached on the mainstage using attachMovie(); it wont let me remove the movieclip tho

here is my code

class close_btn extends MovieClip
{
 function onPress () : Void
 {
  _root.unpause();
  removeMovieClip(_root.help_menu);
  
 }
}