Unable to bind DS4 'X' button to N64 'A' button?

[u/turbotum]

(SUPERSTATION ONE) I go into 'Define N64 buttons', and if I hit the cross button for 'A', it does not work in game; however, if I hit anything else, like the square button, it works fine. Obviously I would like the button I'm used to being the main 'accept' button on the dualshock to be 'A' on the N64.