How to get PS3 Controller working for N64?

Whenever I try changing the controller input to Dualshock/Sixaxis, it won’t let me. For player one the controller just says NA (port#1) and if I try changing it using the virtual D pad, it won’t budge off NA (port #1) on the SNES emulator it changes fine to PS3 controller and it works but I can’t get it to change for N64. Any suggestions?

Additional info: IPod 5 7.0.4

You need to select joystick w/ analog in RGUI