Gamepad not being detected

[Blah3210]

I'm using a PS2 controller, connected via this accessory:

http://www.amazon.com/Magic-Joy-Box-PS2-...B000RLWF7I

I've already set up x360ce and placed the necessary files in the root PPSSPP folder, but when I actually start the emulator there's no indication that PPSSPP detects a gamepad. The controller doesn't work in-game and I can't remap its controls either. This is the only program where I've had this issue, as other games/applications/emulators all recognize the controller.

Any help would be greatly appreciated. If I'm stuck with the keyboard I'd rather not use PPSSPP at all.