I've just installed print o matic. The icon shows up on the page I want to print OK but when clicked nothing happens. The cursor changes to a hand when hovering, so it is live.
I am using it on just one page 'Tickets Order Form' which is a JPEG.
I am running WP 3.8 'Gleam' theme by Elegant Themes and my host is WPhosting in Australia
The site is 'goodolddaysconcerts.com.au' but it is currently behind a maintenance screen. I'll remove it when you are ready to have look.