I'm trying to install this extension http://www.magentocommerce.com/magento-connect/postcode-nl-postcode-complementation-and-validation.html but it's not working.
I can see the settings in the configuration, I can edit those, I can set the extension as enabled, but except for the settings, it's not working.
Strange thing is that I had no problems on my localhost.
I deleted my cache in Magento and in var/cache, I deleted my sessions, I logged out and loggedin multiple times and still, the extension is not working.
Where do I have to look further? Struggling with it for 5 hours now... Maybe something with my permissions?