Help, my Paper Fold doesn't work right!

[AquaPro36183177ktc1]

I have a green screen paper fold and An image of a guiyar I wanted to be unfold this way.

How Can I remove the Guitar from showing while the paper is still unfolding?

We have 3 layers: Our guitar picture. And 2 identical nests consist of paper green screen fold video with a track matt key to the guutar picture layer at the top of each one.

our guitar picture has a track mat key of the nested sequence above it. 

I followed the same instruction of this tutorial but my result is different: 

https://youtu.be/3w_c16jjsoY?si=l1eVR4JtscitEyzx