Loading external SWF files

[AntBirch]

I'm using this code to unload a swf file and go back to the main menu. The main menu has no trouble loading the external swf files but for some reason unloading just doesn't work :s

function BackToMenu(i:MouseEvent):void
{
var BaseMovie:MovieClip = parent.parent as MovieClip; //Sets up a way of unloading this swf (back to main menu).
BaseMovie.parent.removeChild(BaseMovie);
}

Edit: Code above now unloads loaded swf but just shows white.