Why is my Data persistence script not working?

I am trying to make it to where it will save a hat

If it were bought in a in-game store.

game.Players.PlayerAdded:connect(function(plr)
plr:WaitForDataReady() 
plr.CharacterAdded:connect(function(usr)


local stats = Instance.new("IntValue")
stats.Name = "dist" 
local hat = Instance.new("BoolValue") 
hat.Name = "Dominus"
hat.Value = false

hat.Parent = stats 
stats.Parent = plr

if plr:LoadBoolean("A") then
    h = Instance.new("Hat")
    p = Instance.new("Part")
    h.Name = "HoodedAssassin"
    p.Parent = h
    p.Position = usr:findFirstChild("Head").Position
    p.Name = "Handle" 
    p.formFactor = 0
    p.Size = Vector3.new(1, 0.4, 1) 
    p.BottomSurface = 0 
    p.TopSurface = 0 
    p.Locked = true 
    mesh = Instance.new("SpecialMesh", p)
    mesh.MeshId = "http://www.roblox.com/asset/?id=21057410"
    h.Parent = usr
    h.AttachmentForward = Vector3.new (-0, -0, -1)
    h.AttachmentPos = Vector3.new(0, 0.4, 0)
    h.AttachmentRight = Vector3.new (1, 0, 0)
    h.AttachmentUp = Vector3.new (0, 1, 0)
else
    print("Player does not own this hat.")
end

end)
end)

game.Players.PlayerRemoving:connect(function(plyr)
plyr:SaveBoolean("A", plyr.leaderstats.hat.Value)
end)