i trying to add rank system in the game, but the script that i write doesnt change the leaderstats value

game.Players.PlayerAdded:Connect(function(player)
	local stats = Instance.new("Folder", player)
	stats.Name = "leaderstats"
	
	local ilmu = Instance.new("IntValue", stats)
	ilmu.Name = "Ilmu"
	ilmu.Value = 0
	
	local kepintaran = Instance.new("IntValue", stats)
	kepintaran.Name = "Kepintaran"
	kepintaran.Value = 0
	
	local rank = Instance.new("StringValue", stats)
	rank.Name = "Rank"
	rank.Value = "Pemula"
	
	if player.leaderstats:FindFirstChild("Kepintaran").Value >= 20 then
		player.leaderstats.Rank.Value = "Pintar" --this is the script that i write
		end
	if player.leaderstats:FindFirstChild("Kepintaran").Value >= 5 then
		player.leaderstats.Rank.Value = "PelajarBaru"  --this is the script that i write
	end
end)

the same thing happen with my title script, it show "Pemula" billboard gui Rank whenever i join the game.

this is the script

local billboardgui = game:GetService("ServerStorage"):WaitForChild("BillboardGui")
local billboards = game:GetService("ServerStorage"):WaitForChild("Billboards")
local billboardgui1 = game:GetService("ServerStorage"):WaitForChild("BillboardGui1")
	
	 
game.Players.PlayerAdded:Connect(function(player)
	player.CharacterAdded:Connect(function(character)
		local cloneguis = billboards:Clone()
		cloneguis.TextLabel.Text = player.Name
		cloneguis.TextLabel.TextColor3 = Color3.fromRGB(255, 255, 255)
		cloneguis.Parent = game.Workspace:WaitForChild(player.Name).Head
		
	    if player.Name ~= "BlackBooks" then
	        if player.Name ~= "SleepInBlack" then
	            print("Random Player")
	        else
	                local clonegui = billboardgui:Clone()
	                clonegui.TextLabel.Text = "[Owner's Partner]"
	                clonegui.TextLabel.TextColor3 = Color3.fromRGB(255, 94, 94)
	                clonegui.Parent = player.Character.Head or player:WaitForChild("Character").Head
	            end
	 
	    else
	        local clonegui = billboardgui:Clone()
	            clonegui.TextLabel.Text = "[Game Owner]"
	            clonegui.TextLabel.TextColor3 = Color3.fromRGB(255, 0, 0)
	        clonegui.Parent = player.Character.Head or player:WaitForChild("Character").Head
		    end
		end)
	end)
	
game.Players.PlayerAdded:Connect(function(player) --the script start from here
	player.CharacterAdded:Connect(function(character)
		local k = player.leaderstats:WaitForChild("Rank")
		
		if k.Value == "Pemula" then
	    local cloneguid = billboardgui1:Clone()
	        cloneguid.TextLabel.Text = "Pemula"
	        cloneguid.TextLabel.TextColor3 = Color3.fromRGB(0, 255, 0)
		    cloneguid.Parent = player.character.Head or player:WaitForChild("Character").Head
			end
			if k.Value == "PelajarBaru" then
	    local cloneguis = billboardgui1:Clone()
	        cloneguis.TextLabel.Text = "Pelajar Baru"
	        cloneguis.TextLabel.TextColor3 = Color3.fromRGB(204, 142, 105)
			cloneguis.Parent = player.character.Head or player:WaitForChild("Character").Head
		end
		if game:GetService("MarketplaceService"):UserOwnsGamePassAsync(player.UserId, 10995771) then
			local clonegui = billboardgui:Clone()
			clonegui.TextLabel.Text = "[ VIP ]"
			clonegui.TextLabel.TextColor3 = Color3.fromRGB(255, 255, 0)
			clonegui.Parent = player.character.Head or player:WaitForChild("Character").Head
		end
		if k.Value == "Pintar" then
	    local cloneguid = billboardgui1:Clone()
	        cloneguid.TextLabel.Text = "Pintar"
	        cloneguid.TextLabel.TextColor3 = Color3.fromRGB(213, 115, 61)
		    cloneguid.Parent = player.character.Head or player:WaitForChild("Character").Head
			end
	end)
	end)
Anonymous