ADD ONS not working at VARIABLE PRODUCT

Hi everybody! hello from Spain!
I need help with a problem… I need to add a name option for many productos, but these productos at the same time have many options that i create directly with product page (variations and attributes).

The problem is: in a simple product add-ons works but in variable product the product complement doesn’t work, i’ve tried creating complement only for these product but… i don’t know how to fix it.

I want to have an option to write a name or phrase in the notebook.
Someone could help me?! THANKS SO MUCH!

The page I need help with: [log in to see the link]