Help with Changed event and PlayerAdded?

game.Players.PlayerAdded:connect(function(player)
    local stats = Instance.new("IntValue", player)
    stats.Name = "leaderstats"

    local level = Instance.new("IntValue", stats)
    level.Name = "Level"

    local exp = Instance.new("IntValue", stats)
    exp.Name = "Exp"

    local cash = Instance.new("IntValue", player)
    cash.Name = "Cash"

    local class = Instance.new("StringValue", player)
    class.Name = "Class"
    class.Value = "Laser"

    local team = Instance.new("StringValue", player)
    team.Name = "Team"
    team.Value = "White"

    player:WaitForDataReady()
    player.leaderstats.Level.Value = player:LoadNumber("Level")
    player.leaderstats.Exp.Value = player:LoadNumber("Exp")
    player.Cash.Value = player:LoadNumber("Cash")

    level.Changed:connect(function(level)
        print("Levelup")
        levelupframe:TweenPosition(UDim2.new(0.5, -150, 0.5, -50), "Out", "Quad", 1, false)
        leveluptext.Text =  "You have leveled up to Level: " .. level
        levelupframe.CashText.Text = "Cash + 50"
        wait("3")
        levelupframe:TweenPosition(UDim2.new(0, -300, 0.5, -50), "Out", "Quad", 1, false)
    end)
end)

I want have this so when a player joins it gets their values etc set up, but I want when they level up to print("Levelup") and show a a frame, There is no error, and it dosent print at all.