Reply to X1 'Soft Takeover' mod not working

So i'm mapping my X1 for sample decks C & D - but the top 2 buttons 'fx1 on' both don't light up at all?

I wanted them so that when i press it they light up bright orange and when i press it again they go back to their dim light - just like all the rest.

all my other buttons are perfect - i press them and they light up, press again and they dim down.

Any ideas or help would really be appreciated.

Thanks all