Not working with Architekt Theme.

Thank you for your fantastic Photospace Responsive plugin, it is just what I was looking for!! But it down´t work with my Architekt theme (http://www.dessign.net/architekttheme/).
It has no problem with the thumbnails, but the featured image doesn´t load… Would you have any idea why?
I need your help, the final web will be great with both things working together..
You can see my first steps at:
http://oeinternational.com/Home/tanatorio-municipal-virgen-del-sagrario-toledo/
Thank you for your help,
Patri

https://ww.wp.xz.cn/plugins/photospace-responsive/