Attachments… are not displayed ¿?

Hi

This plugin is exactlty what I was looking for. Nevertheless, I’m afraid the attachments are not displayed
I have make a test in my web, in a post (http://comunicacionparaclubes.atodaplana.es/estamos-haciendo-una-prueba-del-plugin-attachments/), and the attachment does not appear.
Here you can see I have already included the attachment:
https://www.atodaplana.es/atp/attachment.jpg

Thanks in advance
Jose Antonio de Luis

The page I need help with: [log in to see the link]