Why wont this script change the value?

local Container = script.Parent.Parent
local Slider = Container.SliderObject
local invisibility = script.Parent.Invisibility
local invisText = script.Parent.Parent.TextLabel

local Dragging

Slider.MouseButton1Down:connect(function()
	Dragging = true
end)

Slider.MouseButton1Up:connect(function()
	Dragging = false
end)

local function ClampAndTweenPosition(Position)
	local FinalPosition = Position
	if (FinalPosition.X.Offset < 0) then
		FinalPosition = UDim2.new(0, 0, 0.5, -12) --FinalPosition = UDim2.new(0, 0, 0, 0)
	elseif (FinalPosition.X.Offset > Container.AbsoluteSize.X) then
		FinalPosition = UDim2.new(1, -Slider.AbsoluteSize.X, 0.5, -12)
	end
	Slider:TweenPosition(
		FinalPosition,
		Enum.EasingDirection.InOut,
		Enum.EasingStyle.Linear,
		0.1,
		true
	)
end

game:GetService("UserInputService").InputChanged:connect(function(InputObject, GameProcessedEvent)
	if ((not GameProcessedEvent) and Dragging) then
		if (InputObject.UserInputType == Enum.UserInputType.MouseMovement) then
			ClampAndTweenPosition(
				UDim2.new(
					0,
					(InputObject.Position.X - Container.AbsolutePosition.X),
					0.5,
					-12
				)
			)
			local theposition = InputObject.Position.X - Container.AbsolutePosition.X
			theposition = theposition/115
	invisibility.Value = theposition
	
		if invisibility.Value < 0 then
				invisibility.Value = 0
		elseif invisibility.Value > 0.95 then
				invisibility.Value = 0.95
			else
		end
		
	if invisibility.Value < 1 then
	invisText.Text = string.sub(tostring(invisibility.Value),0,4)
	end
		end
	end
end)