Why does this Datastore2 not save my data?

It's a script in Serverscriptstorage and yeah, it doesn't save. No errors. Why does it not save?

local Datastore2 = require(script.Parent.MainModule)

Datastore2.Combine("MainKey", "Coins", "Gems")

game.Players.PlayerAdded:Connect(function(plr)
	local dataCoins = Datastore2("Coins", plr)
	local dataGems = Datastore2("Gems", plr)
	
	local folder = Instance.new("Folder", plr)
	folder.Name = "Stats"
	
	local coins = Instance.new("IntValue", folder)
	local gems = Instance.new("IntValue", folder)
	coins.Name = "Coins"
	gems.Name = "Gems"
	
	if dataCoins:Get() == nil then
		coins.Value = dataCoins:Get()
		print(coins.Value)
	else
		coins.Value = 0
	end
	if dataGems:Get() == nil then
		gems.Value = dataGems:Get()
		print(gems.Value)
	else
		gems.Value = 0
	end
	coins.Changed:Connect(function()
	dataCoins:Set(coins.Value)
	end)
	gems.Changed:Connect(function()
	dataGems:Set(gems.Value)
	end)
end)

Thanks in advance!