Context Action Service Not Being Able To Detect Input From Slash?

function slashaction(actionName, inputState, inputObj)
	if inputState == Enum.UserInputState.Begin then
		focus()
	end
end
CAS:BindActionAtPriority("BoundAction", slashaction, false, Enum.ContextActionPriority.High.Value, Enum.KeyCode.Slash)

i when im in studio, i can do it normaly, but when im in-game, it doesnt seem to work, why?

i have no other CAS functions in my game