Problem with "pay with a like plugin"

Hi, I have installed "pay with a like" and it works like a charm.
Unfortunatelly having also installed wp-sentinel users receive an error after having clicked on one of the four buttons (like)
I can provide slide if you need.. I would like to solve this problem because wp sentinel let me feel much more safe...

2) I would like to use "pay with a like" throught another plugin I am building.
This plugin will show a lightbox layer if the page require.
I would like to display the "pay with a like" box inside my light box and let disapear the light box when a user has click on "like / twit /g+"
To do that, I need to understand how to catch the event. Any help?