why doesn't this work1?

local FPSAdorn = require(script:WaitForChild("FPSAdorn"))
local CAS = game:GetService("ContextActionService")
local kc = Enum.KeyCode

local down = {}

local function a(_, state, obj)
	if state == Enum.UserInputState.Begin then
		down[obj.KeyCode] = true
	else
		down[obj.KeyCode] = nil
	end
	--check if any keys are down, if not disable bob
	if down[kc.W] or down[kc.S] or down[kc.A] or down[kc.D] then
		FPSAdorn:ToggleBob(true)
	else
		FPSAdorn:ToggleBob(false)
	end
end

CAS:BindAction(
	"ToggleBob", 
	a,
	false,
	kc.W,kc.A,kc.S,kc.D, kc.Y
)

print(CAS:GetBoundActionInfo("ToggleBob"))

It executes if I bind to to a mouse input, but not a key.