Problems with shipping methods

-- url of the page with the problem -- : www.studiocenter.com.py
-- HikaShop version -- : 2.3.5
-- Joomla version -- : 3.3.6
-- PHP version -- : 5.4

My system is giving the following error:

Strict Standards: Declaration of plgHikashopshippingCorreios::onShippingSave() should be compatible with hikashopShippingPlugin::onShippingSave(&$cart, &$methods, &$shipping_id, $warehouse_id = NULL) in /home/wwwhfabrasivosco/public_html/plugins/hikashopshipping/correios/correios.php on line 203

Hello,
Thanks for your feedback, note that when you shop is in production mode you should :
- Disable the Joomla debug mode ("Administration->Global configuration->System->Debug System/Language")
- Set the "error reporting" option of the Joomla configuration to "none"

Solved!
I had to set up zones!