Hi.
I have purchased a Mayflash SNES to USB Gamepad. 
And 2 original SNES controllers.
Have read up and down on internet and watched movies on Youtube on how to map controller for EmulationStation. I can get it to work as menu controller (i configured it in ES and it just works).
But when I fire up a Emulator i.e. SNES emulator – nothing works!
I have also tried to configure with the RetroPie_setup.sh and using RetroArch controller – but it does not recognize any of the Button pushes (is this because it only reads USB controllers?).
Please help me! Im new to the whole Rasp PI stuff, so I need explanations.
Thank you for any comments and help. Very much appreciated.