[SOLVED] Simple UI - First Selected not highlighting, controller not being detected

So I've just got a simple game up and running at the moment; it controls with the keyboard or controller.
I decided to give it a little menu system, but for the life of me cannot get it to work with the controller - the mouse works fine.



As you can see in the preview here, I have the Event System set up to pick StartBtn as First Selected.
I have the Horizontal and Vertical axes set to the inputs I created - which work fine with my game.
And I...

[SOLVED] Simple UI - First Selected not highlighting, controller not being detected