[Plugin: WooCommerce – excelling eCommerce] Need help with custom Shipping method class

Ok, so I finally got it to the point where it actually does something. but Why it does what it does, is beyond me.

I disabled all other Shipping methods except my own. As a test I simply do this:

$rate = array(
                'id' 	=> $this->id,
                'label' => "",
                'cost' 	=> 5,
            );

            $this->add_rate( $rate );

What happens is:

1) At first this amount of 5 is added to the totals
2) When I choose the country “Netherlands” It suddenly changes to 6,05
3) When i choose “Belgium” It disapaers and states I must enter address. When I add something to the “State” field, it changes back to 6,05 again.

Now I suppose the 6,05 is the 5 plus taxes? But if, so why does it not get added before I enter a country (besides the 5 I entered is already tax included)
And why is it dependend on the state? I actually want to hide the state-field because it is redundant for my situation.

The Documentation is not very clear on the Shipping API

Thanks for the reply.

The client is low on funds (non-profit) and I do the project for next to nothing. 80$ is a bit to steep I am afraid.

While I suspected the country code to be “Wrong” it was something I decided to c heck later, after I got the basics to work.
Right now I do not look at the country code. I have a very basic class that just does $this->add_rate as described in my second post.
I included this method for all countries.

What I have right now is:

class WC_PostNL extends WC_Shipping_Method {
        //var $id = 'postnl';

        function __construct() {
            $this->id           = 'postnl';
            $this->method_title = "PostNL";
            //$this->title 	= "PostNL";
            //$this->enabled = true;
            $this->init();
        }

        function init() {
            $this->init_form_fields();
            $this->init_settings();

            $this->enabled      = $this->settings['enabled'];
            $this->title        = $this->settings['title'];
            $this->availability = $this->settings['availability'];
            $this->countries    = $this->settings['countries'];

            add_action('woocommerce_update_options_shipping_' . $this->id, array(&$this, 'process_admin_options'));
        }

        function init_form_fields() {
            global $woocommerce;

            $this->form_fields = array(
                'enabled'      => array(
                    'title'            => __('Enable/Disable', 'woocommerce'),
                    'type'             => 'checkbox',
                    'label'            => __('PostNL aan/uit zetten', 'woocommerce'),
                    'default'          => 'yes'
                ),
                'title'        => array(
                    'title'            => __('Method Title', 'woocommerce'),
                    'type'             => 'text',
                    'description'      => __('Titel', 'woocommerce'),
                    'default'          => __('PostNL', 'woocommerce')
                ),
                'availability' => array(
                    'title'            => __('Method availability', 'woocommerce'),
                    'type'             => 'select',
                    'default'          => 'all',
                    'class'            => 'availability',
                    'options'          => array(
                        'all'          => __('All allowed countries', 'woocommerce'),
                        'specific'     => __('Specific Countries', 'woocommerce')
                    )
                ),
                'countries'    => array(
                    'title'            => __('Specific Countries', 'woocommerce'),
                    'type'             => 'multiselect',
                    'class'            => 'chosen_select',
                    'css'              => 'width: 450px;',
                    'default'          => '',
                    'options'          => $woocommerce->countries->countries
                )
            );
        }

        function calculate_shipping($package = array()) {
            $this->rates = array();

            $rate = array(
                'id' 	=> 'dd',
                'label' => "",
                'cost' 	=> 5,
            );

            $this->add_rate( $rate );

        }

        function is_available($package) {
            global $woocommerce;

            if ($this->enabled == "no") {
                return false;
            }
            return apply_filters('woocommerce_shipping_' . $this->id . '_is_available', true);
        }

    }

Which yields the strange behaviour as described in my second post.