Suprabeener image gallery tutorial

I’ve tryed allmost a day to make it work … but i don’t know where’s the problem. A movie clip (of size of the pictures), 2 buttons and the Script in a new layer. Now … which part am I missing ???
I also modifyed the tutorial found here so it could show my pics, but it ayn’t showing anything. And no errors also. I’ve tryed with and without the mask, but no result.
So i please you to advise.
Thanks