Why is the tween not happening? It prints the player opens/closes gate.

local gate = game.Workspace:FindFirstChild("Gate")
local debounce = false

game.Players.PlayerAdded:Connect(function(player)
	local role = player:GetRankInGroup(3736685)
	if role >= 168 then
		player.Chatted:Connect(function(message)
			if message == ":open gate" then
				print("Player commands to open the gate.")
				for i,v in pairs(gate:GetChildren()) do
					print("A")
					if v:IsA("Part") and debounce == false then
						debounce = true
						local info = TweenInfo.new(3, Enum.EasingStyle.Sine, Enum.EasingDirection.In, false, 0)
						local tween = game:GetService("TweenService"):Create(v,info,{Position = Vector3.new(v.Position.X,v.Position.Y-15,v.Position.Z)})
						tween:Play()
					end
				end
			end
			if message == ":close gate" then
				print("Player commands to close the gate.")
				for i,v in pairs(gate:GetChildren()) do
					if v:IsA("Part") and debounce == true then
						debounce = false
						local info = TweenInfo.new(3, Enum.EasingStyle.Sine, Enum.EasingDirection.In, false, 0)
						local tween = game:GetService("TweenService"):Create(v,info,{Position = Vector3.new(v.Position.X,v.Position.Y+15,v.Position.Z)})
						tween:Play()
					end
				end
			end
		end)
	end
end)

It goes till the print("A").