When I kill someone with a sword the ko's won't work but the wipeouts work How do I fix this?

PLAYERS={"PLayer"}
function check(name)
        if #PLAYERS == 0 then return false end
        for i = 1,#PLAYERS do
                if (string.upper(name) == string.upper(PLAYERS[i])) then return true end
        end
        return false
end
function onHumanoidDied(humanoid, player)
	local stats = player:findFirstChild("leaderstats")
	if stats ~= nil then
		local deaths = stats:findFirstChild("Deaths")
		deaths.Value = deaths.Value + 1
		local killer = getKillerOfHumanoidIfStillInGame(humanoid)
		handleKillCount(humanoid, player)
	end
end
function onPlayerRespawn(property, player)
	if property == "Character" and player.Character ~= nil then
		local humanoid = player.Character.Humanoid
		local p = player
		local h = humanoid
		humanoid.Died:connect(function() onHumanoidDied(h, p) end )
	end
end
function getKillerOfHumanoidIfStillInGame(humanoid)
	local tag = humanoid:findFirstChild("creator")
	if tag ~= nil then
		local killer = tag.Value
		if killer.Parent ~= nil then
			return killer
		end
	end
	return nil
end
function handleKillCount(humanoid, player)
	local killer = getKillerOfHumanoidIfStillInGame(humanoid)
	if killer ~= nil then
		local stats = killer:findFirstChild("leaderstats")
		if stats ~= nil then
			local kills = stats:findFirstChild("Kills")
			if killer ~= player then
				kills.Value = kills.Value + 1
			else
				kills.Value = kills.Value - 0
			end
			local points = stats:findFirstChild("Points")
			if killer ~= player then
				points.Value = points.Value + 1
			else
				points.Value = points.Value - 0
			end
		end
	end
end
function onPlayerEntered(newPlayer)
	local stats = Instance.new("IntValue")
	stats.Name = "leaderstats"
	local kills = Instance.new("IntValue")
	kills.Name = "Kills"
	kills.Value = 0
	local deaths = Instance.new("IntValue")
	deaths.Name = "Deaths"
	deaths.Value = 0
	local points = Instance.new("IntValue")
	points.Name = "Points"
	if not (check(newPlayer.Name)) then
		points.Value = 0
	else
		points.Value = 10000
	end
	kills.Parent = stats
	deaths.Parent = stats
	points.Parent = stats
	while true do
		if newPlayer.Character ~= nil then break end
		wait(5)
	end
	local humanoid = newPlayer.Character.Humanoid
	humanoid.Died:connect(function() onHumanoidDied(humanoid, newPlayer) end )
	newPlayer.Changed:connect(function(property) onPlayerRespawn(property, newPlayer) end )
	stats.Parent = newPlayer
end
game.Players.ChildAdded:connect(onPlayerEntered)
Anonymous