Track clicks on button using DTM

Hi, Can anyone tell me how to track clicks for this button (Request Information) on this page (www.vitas.com). I have defined an event based rule in DTM (rule name: Request information button clicks) with event type as click, element tag selector as div, manually assigned a property as id=purpleheaderbutton, used allow event to bubble on child elements, set tracking to s.tl() and assigned it to an event. But still this rule won't fire on my page and adobe debugger doesn't record my assigned event. Can anyone tell me how to setup this rule correctly to track clicks for this button.