Event Trigger won't fire

Trying to get triggers working on a game object so that when I click on my game object it fires a method. I have an Event System and a Event Trigger working on a UI element in the scene already but it was a little quirky when I was trying to get it to work and now I seem to be experiencing the same quirkiness with this new game object.

The new game object is a prefab this time with a Canvas component that I placed on it and an Event Trigger. Am I missing a key thing to how Event Triggers work? I compared my new trigger set up to the one I have in the same scene that is working but I can't see anything different between the two.

Here's a screenshot of the set up in the inspector.