Blueprint function library don't work after package

Hello all.
I created a Blueprint function library, to add a blueprint node that allow me change the culture in game, so i can change the languaje of the sentences by a options menu.
When i play the game from the editor, in stand alone mode, everything works fine, and i can change the languajes from the menu.
But after packaging the proyect, that menu dont work, so i asume the blueprint function library is not added to the cooked packages.
I dont know if i need to do something special to add the new code to the package.
Any ideas? please

Thanks in advance.

Fixed !

The problem was’nt in the function.
I revised all the options on the project setting and i noticed the Internationalization Support was i english.
As soon as i changed to ALL, everithigs works nice!