(SOLVED) MD Mesh doesn't work with sliders, help

Hello!!

I have a problem with my mesh, I tried everything I know with tutorials and stuff, and it still does not work with sliders (bottom part of the mesh).

Here all the pictures : imgur.com/a/QR5MF7J


I followed all the proper steps :

UV 1: append top, subdivide cut 10, select my mesh, go to modifier data transfer, select append top, select face data corner, and face data boxes. Click UV'S changed the uv's for  uv_1 and uv_1... then apply.

Vertex paint:
I use code F3F315 , set vertex colors

Weight transfer:
Select append top, select my mesh while holding shift, click transfer weights,  put source to by name and destination to all layers, click on my mesh, then click clean ( because i use blender 2.78) and then change subset to all groups..

At this point, I do know what to do to make the mesh works in CAS with sliders. I dont why I get this issue ONLY at the bottom of the top and not anywhere else.


Also here is the blender file, if someone can take a look, I would appreciate :(
Ive been trying fixing this mesh for 2 days and its been a nightmare.

Blender file: www.filedropper.com/pleasewoooooooooorkiswearidideveryanddeleteskinattempst2

( please don't mind the name lol)

Thanks a lot !