Sidebar will not appear on one page

Hi

We are using this plugin on Amero.dk, but we have one issue. We have one page, where the sidebar will not appear. We want to try something so we have setup af copy of out website. The page that this issue is regarding, is http://amero.dk.prolinux1.curanetserver.dk/e-conomic-kasseapparat/.

In the back-end we’ve set the page to “Left Sidebar” and we have marked Widget (CUSTOM-produkter) to this page in the plugin, but it will not appear.

We have comparet this page with one of the other, and we have made the exact same setup on both pages?

https://wordpress.org/plugins/sidebar-manager-light/