PLZ help with my tween

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1

I have Tweened models before, but for some reason my script does not work. Could you guys help?

Script inside the button (the button to open my gate)

local tweenService = game:GetService("TweenService")
local info = TweenInfo.new(5, Enum.EasingStyle.Sine)

local debounce = false
local button = script.Parent

local open = Vector3.new(229, 13, 278)
local main = script.Parent.Parent.PrisonGate.Main
local closed = main.Position

for i, v in pairs(main.Parent:GetChildren()) do
	if v:IsA("BasePart") then
		local weld = Instance.new("WeldConstraint")
		weld.Part0 = v
		weld.Part1 = main
		weld.Parent = v
	end
end

button.ClickDetector.MouseClick:Connect(function(player)
	if not debounce then
		debounce = true
		
		if main.Position == open then
			local tween = tweenService:Create(main, info, {Position = closed})
			tween:Play()
		else
			local tween = tweenService:Create(main, info, {Position = open})
			tween:Play()
		end 
		
		wait(5)
		debounce = false
	end
end)

It tweens the main part, but the parts within the model, do not move with the main part. I have welded everything…Every part in the model is unanchored except the main part.

2

Tween the CFrame of the part, rather than the Position.