Why is this function not returning a animation object?

Every time I click two times while having the the tool equipped it doesn't return the animation object,why?

Why is this function not returning the object?

Player = game.Players.LocalPlayer
Character = Player.Character
Tool = script.Parent
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function CreateAnimation(id,Humanoid)
    local AnimationName = "Animation_"..id
    local FoundAnimation = Humanoid:FindFirstChild(AnimationName)
    if not FoundAnimation then
        local Animation = Instance.new("Animation",Humanoid)
        Animation.Name = AnimationName
        Animation.AnimationId = "http://www.roblox.com/Asset?ID="..id
        return Animation
    else
        return Animation
        end
    end
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Tool.Equipped:connect(function(Mouse)
    print("Equipped")
    Mouse.Button1Down:connect(function()
        Humanoid = Character.Humanoid
        local Animation = CreateAnimation("169093883",Humanoid)
        local AnimationTrack = Humanoid:LoadAnimation(Animation)
        print(Animation)
    end)

end)