Nested EventTrigger won't execute, UnityUI

Here's my GameObject heirachy:

 - Canvas
 - - Game Object (Interface Container)
 - - - Game Object (Button group container)
 - - - - EventTrigger (Button). 

Graphic Raycaster settings:

  - Ignore Reversed Graphics: true
  - Blocking Objects: None
  - Blocking Mask: Everything

The events that I'm trying to use are

• Pointer up

• Pointer down

I'm attempting to create a hold to activate button. I've done all of the logic, however the methods are never being called by the EventTrigger. I've tried other triggers as-well and it seems like the entire EventTrigger component isn't firing.

I have an EventSystem in the scene.

This is absolutely essential to my application. Thanks for any help.