https://www.retrocases.nl/winkel-retro-hoesjes
The problem is that I can’t enable 2.6 because the webshop is up and running with customers surfing the website at the moment, so 2.0 is running right now, which works fine.
If you need any information from my setup, feel free to ask.
I use the latest version of WordPress (3.4.2), Woocommerce and everything is up to date.