shortcode does not work to protect download

please take a look at the download link at the bottom of this page and explain to me why it is not working and protecting content from visitors

i require someone to go in and take a look at the text editor to help me configure this

I have been advised what i did was right, so do not know what is corrupting the process.

currently any visitor can search for products on my site and download them, i need to stop this and the shortcode nor the access levels are working to prevent this

Thankyou for advice