Dialogue System Extension- Mouse Not Working as expected

I am trying to use the Dialog System extension created by Hondred as it makes creating dialog so much simpler. But i am having problems in a dialog box show triggered between two NPC’s(its kind of a cutscene). Hondred does provide an example project whose event sheet is as follows:

But my copy of the same wont work. Here is the relevant portion of my event sheet:

Can anyone help?