How do I get the Pop Up! Plugin for WP to work?

I am having trouble getting my Pop Up!/Pop Over (which one is it, by the way?) to function on my WP site. I have installed the plugin successfully activated it, and made a plug in using HTML in the text editor - very cool by the way.

However, now that I have done all that, I do not see the pop up appearing anywhere. I am certain there is a painfully obvious solution to this. What is the next step here to get my pop up running on my site?

Please respond to this at ferris@nicholaswilton.com

Thank you in advance for your help. Also, not sure if this helps, but I have granted you guys support access to my website.

Best, Ferris