DataStore won't work... Can anybody help with my script?

No data is being loaded, and I'm not even sure if the data is being saved.

No output.

The Strength is popping up in the leaderboard, but its value is always 0, even if I tried to save the data.

DataStore = game:GetService("DataStoreService"):GetDataStore("Strength")

game.Players.PlayerAdded:connect(function(player)
    local l = Instance.new("IntValue", player)
    l.Name = "leaderstats"
    local s = Instance.new("IntValue", l)
    s.Name = "Strength"
    player.leaderstats.Strength.Value = DataStore:GetAsync("Strength_" ..player.Name.. "")
    player.leaderstats.Strength.Changed:connect(function(newValue)
        DataStore:SetAsync("Strength_" ..player.Name.. "", newValue)
    end)
end)