Need Assistance Configuring "show on user click" rule

I'm trying to get the selector syntax and class right to trigger a simple popup on a link and/or element resident in a slider.

The site is:
http://blog.bizmedialaw.com/

Trying to get the red "schedule a consult" image button to be the trigger for the popup.

I tried to follow this link for guidance but gave up after about 1.5hrs. :
https://premium.wpmudev.org/forums/topic/popup-onclick-rule-only-works-once

Any guidance would be appreciated!