I've installed a plugin that enables a custom shipping method into my store (calculates shipping method with my postal service). It works with any product, except those with recurring profile enabled.
I found this link http://www.magentocommerce.com/knowledge-base/entry/working-with-recurring-profiles/Magento-Knowledge-Base-Working-with-Recurring-Profiles saying:
... For products with recurring profiles, the customer can only choose between the fixed-price shipping methods (flat, table or free) when checking out. ...
Why there is this rule? How can I make my custom shipping method work with recurring profile products?
I've tried these plugins and both doesn't work.
https://github.com/pedro-teixeira/correios
https://github.com/willstorm/correios
Which files should I look at to edit to solve this?