Close button for Pan large image

Hi!
i need to pan a large image. I didn´t used the kirupa example, because this was more what i was looking for. The problem is that a i need a close button so i can go back to the small image (unload it). Example:

picture1.swf (contaings a medium size picture) when i click over it, goes to picture1_big.swf where i can pan the image.
The problem is that if i put a close button it doesn´t recognize it. Everything is made with AS.

I uploaded the files http://rapidshare.com/files/199279655/kirupa.rar.html

Thanks!!!