Has anyone gotten weight based shipping to work?

It looks like you need to use an array to pass the weight and price values, however there is no example code that demonstrates how it should be done?

/**
* Calculates the shipping cost of an order, by taking the products
* and calculating the shipping weight, based on an array set in _config
* ASSUMPTION: The total order weight can be at maximum the last item
* in the $shippingCosts array.
*/

Any clues / ideas?

Thanks in advance
-Ross

I'm tried to put this code in config file:

WeightShippingModifier::shippingCosts(array(
   '1' => 15,
   '3' => 30,
   '5' => 50,
));

but it doesn't worked.

Has anybody ideas or example how to ser weight based shipping?

Sorry, here is more information.

When I'm trying to set Weight based shipping array (see code above), I get this error message: Fatal error: Call to undefined method WeightShippingModifier::shippingcosts() in /var/www/vhosts/sandie.dev.bluwcreative.com/httpdocs/mysite/_config.php on line 111

I used class "shippingcosts" because it was on the documentation:

* Calculates the shipping cost of an order, by taking the products
* and calculating the shipping weight, based on an array set in _config
*
* ASSUMPTION: The total order weight can be at maximum the last item
* in the $shippingCosts array."

Maybe this array code is wrong and I should use another class from WeightShippingModifier.php ?

Thanks for any help!

My System:
ecommerce 0.6 beta 1
silverstripe 2.3.2 (stable version)
php 5.2.9
mysql 5.0.83
apache 2

I didn't found there any static method (see attached file).