Box not showing

My box does not appear. Any idea what I have done wrong?

WordPress theme: Twenty Thirteen
The Plugin is installed and shows in the sidebar. I have made a new box, customized the appearance, tried both with Enable test mode on and off, but the box has not shown once.

My blog is http://www.lisasnewyork.com/

Would really appreciate your help!
Lisa

https://wordpress.org/plugins/scroll-triggered-boxes/