Well the only thing I can think of is that you misswired it or a wire came loose.
Look at my pic of the Superpad to see what wires went where. They go to the same places on the SuperPad stick. Then you will need to connect two pins from each pot like so :
Heck I drew a crappy pic :
My Portable Systems:
-----Genimini---------Darth64---------Dreamtrooper--------Ncube---------Kamikazi64---N64Boy Advance