Loading external SWF files

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.

unload() is only responsible for disconnecting a Loader object from an object it has loaded. If no other object contains a reference to that loaded object it will be garbage collected. In the case of swf files, it's likely still referenced by the display list in which case you will need to call displayObject.removeChild().

unload() is mainly used for triggering an UNLOAD event that the loaded object may listen for and shut down any other data streams safely before being unloaded.

hey have tried to do what you've said here but now as you can see by my edit of my original post I just get a white screen.