Label alpha HELP

[Lipa4d]

https://drive.google.com/file/d/1rKrcGa0OiWuDX88o2DfZuol8XwbflE8R/view?usp=sharing 

Hi Guys, I'm brand new with Arnold in Cinema 4D, I need some help.
I need to add a transparent label under my glass jar, i created an alpha material it looks good in the viewport however when i click render my label is replaced by a black block i don't understand what i'm doing wrong i'm two days trying to fix it.
Any good souls to help me?
I'm attaching both a screenshot and the Cinema 4D file if anyone can look and see where I'm missing something.

Thank you

[leandro.cattani]

Hello! 
The procedure to Stack materiais isn't use cutout opacity. In the material manager you have to select the material you want to be on top and, in the atributes, select the tab "alpha (stacking), and choose the way to stack.

[peter_horvath]

As far a see in your attached scene, you already have the alpha image in the "alpha (stacking)" tab of your material. What missing really is adding a base layer, like another standard surface to the object:

And you don't need the cutout opacity.

Alternatively you can use a single material with a layer shader and use the alpha image as the mix.