HELP_ V3 with Thumb Scroll Slide

Hallo Guys,

I really do not understand why, why it doesn’t work my gallery.

it’s the famous and beautiful V3:with thumbs Scroll

I would only add a slideshow and prev andnext button.
I’ve searched everywhere in the Forum, Scotty gently helped me in addind the slideshow in another version of this gallery.

What i’m wronging? I don’t Understand.
Check the file and suggest me the way to escape by this problem.