Slide_menu_photo (help)

Hi! I'm learning flash just now (Flash 5).
I get a very nice fla souce from the web and I want to use in a diferent way but I can't make it.

Basically, the movie clip has only 10 images that appear in the timeline through buttons (moving the _alpha value), and I want just to replace the 10 images and add 10 more. Ok!

The problem is...that only the first 11 images work!!!!
The last 9 images seems to appear behind of something!?
I think that as to do with the action layer (frame7):

p = getProperty("/photo", _x);
b = getProperty("/btn", _x);
if ((p)<(-1072)) {
setProperty ("/photo", _x, -494);
setProperty ("/btn", _x, -494);
gotoAndPlay (_currentframe-1);
}
if ((p)>85) {
setProperty ("/photo", _x, -494);
setProperty ("/btn", _x, -494);
gotoAndPlay (_currentframe-1);
}


Help me please!
The original source is here:
http://www.pontoflash.com.br/sources...enu_fotos.html