Wikipad buttons not working in eaulators

Just bought myself a Wikipad and was looking for emulators, and have chosen RetroArch as I recognise the name from Raspberry Pi

Anyway, thought I’d fire up an old favourite, Sensible Soccer on the Genesis/Megadrive

Was very happy when it detected the WikiPad controller on the yellow text on the bottom of the screen

But while the D-Pad works OK, the buttons (A B C etc) appear to be non functional

Can anyone help?

Thanks

Did you try to bind the keys in the input options menu?

That option is greyed out at present, as it is on autodetect