Bullet script to Filtering Enabled?

My gun is working but on online, gun isnt working help me

ball = script.Parent
damage = math.random(12,18)



function onTouched(hit)
	local humanoid = hit.Parent:findFirstChild("Enemy")
	
	if hit.Parent.className == "Hat" or hit.Parent.className == "Tool" or hit.CanCollide == false then return end

	if hit.Name == "Bullet" then return end

	if humanoid ~= nil then
		tagHumanoid(humanoid)
		if hit.Name == "Head" then
			humanoid:TakeDamage(damage * 3)
		elseif hit.Name == "Torso" then
			humanoid:TakeDamage(damage * 1)
		end
		wait(2)
		untagHumanoid(humanoid)
	end

	connection:disconnect()
	ball.Parent = nil
end

function tagHumanoid(humanoid)
	-- todo: make tag expire
	local tag = ball:findFirstChild("creator")
	if tag ~= nil then
		local new_tag = tag:clone()
		new_tag.Parent = humanoid
	end
end


function untagHumanoid(humanoid)
	if humanoid ~= nil then
		local tag = humanoid:findFirstChild("creator")
		if tag ~= nil then
			tag.Parent = nil
		end
	end
end

connection = ball.Touched:connect(onTouched)

wait(4)
ball.Parent = nil