Hi, I'm using Silvershop and I have trouble configuring shipping correctly.
What I want to do is to set up two flat rates :
- one for customers in France
- one for customers from other countries.

config.yml :

Order:
  modifiers:
    - 'SimpleShippingModifier'

SimpleShippingModifier.php :

private static $default_charge = 17;
private static $charges_by_country = array(
    'FR' => 6
);

But nothing happens during the checkout : the shipping always sticks to 17, which is my default charge, whatever country I set in the shipping adress.
When I debug the shopping cart (dev/shop), the "country" line in the "modifiers - has many" list is empty.

What step am I missing ?
Thanks a lot for helping me !

Solved : I had to install the shipping module, which I thought was optional. Something must be missing in the core module documentation, or / and in the composer dependancies.