Pop Over Plugin Does not sem to work

I just created a multisite wordpress 3.0.1 website. Domain below:

http://affiliatemarketingemail.com

I installed The Pop Over plugin and added a test comment to see how the plugin works.

I cannot get it to display anything, and I have tried different themes.

I am not sure if I am doing something wrong or if the plugin does not work in WordPress 3 Multisite