Custom keymap not working properly

This may not be the right place though I am attempting this through keymap editor:
I’ve been trying to get CEC commands mapped to a wireless remote button I tried mapping it directly with no luck:

I then tried mapping a script instead since I read online that can be done; while the script does run from file manager for some reason it doesn’t seem to launch from the keymap (nothing happens even though other menus mapped to the key work)