External SWF with MC Buttons

I can’t seem to get this to work, and it has something to do with the buttons. I am using MC buttons for a webpage and I want to use external swfs for page transitions. The method I am using works with normal buttons, but does not with MC buttons. I want to keep the MC buttons because it just looks and works better.

EDIT: For some reason the attachment didn’t work, so go to this URL to download the fla file.

http://www.pxlmatrix.com/maintest.zip

Check the attachment for the info. Any help or maybe another method for the transitions would be greatly appreciated. The current method does a smooth out and in transition and that is how I would like to keep it.

Thank you in advance.