Well I had the same issue back in the day and for some reason it's FFXI that doesn't see the triggers nor the right stick. The best answer I would tell you is use the listed controllers they have. Because this has been an issue since 2006.

Compatible Peripherals for North America

Recommended Controller
Logitech® Cordless Rumblepad™ 2

Controllers
Logitech® Rumblepad™ 2 Vibration Feedback Gamepad
Logitech® Dual Action™Gamepad