AS on buttons doesn't work inside MC's?

I need some help, I’m sure this is fairly simple, I just can’t figure it out.

I found the tutorial on “loading into target for MX” and “loading external .swf’s with preloaders”… I got through them fine, and understand them and their logic, (I believe) with no problem. I was able get the AS to work perfectly in my own application UNTIL… I embedded the buttons themselves into a MC. I tried reworking the paths, but to no avail. the buttons “act” like buttons, but the AS never calls the external .swf, it’s just dead.

I’m attaching a file that illustrates the use, and the way I’ve incorporated the AS. If anyone could help me sort this out I’d be very grateful…

Thanks a lot!