Help with DataPersistance? (And Don't say DataStores are better. They're a pain in the backside!)

I've attempted DataStores, and even with ScriptGuider's help, I have no clue. So I've resorted to DataPersistance, but once again, it won't *~%"£$% work.

local group = 1234 --GroupID

game.Players.PlayerAdded:connect(function(player)
    if player:WaitForDataReady() then
        local leadr = Instance.new("IntValue",player)
		leadr.Name = "leaderstats"
		local rank = Instance.new("StringValue",leadr)
		rank.Name = "Rank"
		local department = Instance.new("StringValue",leadr)
		department.Name = "Department"	
		if player:IsInGroup(group) then
			rank.Value = player:GetRankInGroup(group)		
			department.Value = game.Players[player.Name]:LoadString("Department") --Load the Department
			while wait(30) do
				rank.Value = player:GetRankInGroup(group)
			end
		else
			rank.Value = "Guest"
			department.Value = "N/A"
		end
		player.leaderstats.Department.Changed:connect(function()
			game.Players[player.Name]:SaveString("Department", player.leaderstats.Department.Value) --Save the Department
		end)
    end   
end)

There's no error, but the value won't load. Which is pretty annoying as DataStores won't work, nor will this.

Data Store is actually better... Here's a link to a good tutorial - https://www.youtube.com/watch?v=Nfm-CtRUNqk[](http://)