Detecting a second controler with Mario Kart

[anthonner]

I'm trying to detect a second PC controller in mario Kart. I can set my controller 1 and 2 in Daulphin setting but in the game only 1 is being detected when im trying to play (multiplayer) 2 Player.
Both of my PC controller working very well when i choose it into (Controller 1)

Any idea how i can detect them both ?