Leonardo Game Controller not showing up in HTML5

Development Boards Arduino
1

I have a great USB game controller based on Leonardo using this tutorial:

http://www.instructables.com/id/Arduino … rJoystick/

When I look at control panel/devices and printers/game controller/properties, I can see everything is active and working.

However, I cannot get the game controller to show up when I go to this website to check it working in a HTML5 browser:

http://html5gamepad.com/

?

I have another xbox style USB game controller that works fine.

How can I get the Arduino one to work as a joystick in HTML5?