My script only runs once then it stops firing the function. Any help?

So I tested my script out and it only ran once and then the next person who joined it didn't run. I suspect its an error, but I can not find it no matter how many times i look through it. Maybe one of you can? Here is the script:

for i = 1, leader.MaxPlayers.Value do
local x = Instance.new("TextLabel")
x.Parent = leader.Players
x.Name = "Player" .. i .. "L"
x.Size = UDim2.new(0, 120, 0, 10)
x.FontSize = "Size14"
x.TextColor3 = Color3.new(color)
x.BackgroundTransparency = 1
x.BorderSizePixel = 0
x.Position = UDim2.new(0, 50, 0, 50) + UDim2.new(0, 0, 0, 20*i)
x.Visible = false
-------------------- LABELS MADE ------------------------------
local w = Instance.new("StringValue")
w.Parent = leader.Players
w.Name = "Player" .. i 
table.insert(playerlist, x)
table.insert(playervalue, w)	
end
game.Players.PlayerAdded:connect(function(plr)
for i, v in pairs(playervalue) do
	if adding == false then
	if v.Value == "" then
		v.Value = plr.Name
		print("Player Added")
		adding = true
	end
	end
end
adding = false
if Stats == true then
		game.StarterGui.Leaderboard.Stats2.Value = true
	local starterstats = Instance.new("Model")
	if StatsName ~= "" then
	starterstats.Name = StatsName
	starterstats.Parent = plr
	end
	if Stat1 ~= "" then
	local firststat = Instance.new(Stat1Type)
	firststat.Parent = starterstats
	
	firststat.Value = Stat1Value
	firststat.Name = Stat1
	end
	if Stat2 ~= "" then
		local secondstat = Instance.new(Stat2Type)
			secondstat.Parent = starterstats
		secondstat.Value = Stat2Value
		secondstat.Name = Stat2
	end
	if Stat3 ~= "" then
	local thirdstat = Instance.new(Stat3Type)
	thirdstat.Parent = starterstats
	thirdstat.Value = Stat3Value
	thirdstat.Name = Stat3
	end

game.Players.PlayerAdded:connect(function(plr)
for i, v in pairs(playervalue) do
	if adding == false then
	if v.Value == "" then
		v.Value = plr.Name
		print("Player Added")
		adding = true
	end
	end
end
adding = false
if Stats == true then
		game.StarterGui.Leaderboard.Stats2.Value = true
	local starterstats = Instance.new("Model")
	if StatsName ~= "" then
	starterstats.Name = StatsName
	starterstats.Parent = plr
	end
	if Stat1 ~= "" then
	local firststat = Instance.new(Stat1Type)
	firststat.Parent = starterstats
	
	firststat.Value = Stat1Value
	firststat.Name = Stat1
	end
	if Stat2 ~= "" then
		local secondstat = Instance.new(Stat2Type)
			secondstat.Parent = starterstats
		secondstat.Value = Stat2Value
		secondstat.Name = Stat2
	end
	if Stat3 ~= "" then
	local thirdstat = Instance.new(Stat3Type)
	thirdstat.Parent = starterstats
	thirdstat.Value = Stat3Value
	thirdstat.Name = Stat3
	end