Use two PS3 pads for 2 player

[Rewt0r]

Hi, I have been trying to get this to work for ages now and cannot seem to accomplish it.
I'm trying to use 2 players on Super mario bros for the Wii using two PS3 pads.
The first one is set up using emulated Wiimote and so is the second, but when i select two players in the game and press + to join another pad and it asks me to press 1 and 2 at the same time the second pad does not get enabled.
How can I resolve this?