How Do I Force a player to sit in a VehicleSeat and make them not be able to leave?

function module:CarSpawn(player,Pos,par)
	wait()
	local car
	local val = player:WaitForChild("Values")
		local kt = val:WaitForChild("KartChosen")
		
		repeat wait() until (carModels:FindFirstChild(val.KartChosen.Value)) 
	 car = carModels:FindFirstChild(val.KartChosen.Value):Clone()

		--anchor(car,true,true,"VehicleSeat")	
	local center = car:GetModelCFrame()	
	TransformObjects(car:GetChildren(),center,Pos +Vector3.new(0, (car:GetExtentsSize().Y /2) + 1,0),true)	
	
	car:MakeJoints() wait()	

	repeat wait() until player.Character
	repeat wait() until player.Character.Torso
	
	
	player.Character.Humanoid.WalkSpeed = 0
	 car.Parent=par car:MakeJoints()
	Instance.new("Model",car).Name = "DestoryOnLeave"
	--player.Character.Torso.CFrame = car.VehicleSeat.CFrame + Vector3.new(0,car:GetExtentsSize().Y  + 1 ,0)

	local Xeld = Instance.new("Weld",car.VehicleSeat) -- makes a weld 
	Xeld.Name = "SeatWeld"
	Xeld.Part0,Xeld.Part1  = Xeld.Parent,	player.Character.HumanoidRootPart -- welds the parts
	player.Character.Humanoid.Sit = true -- makes the player sit
	Xeld.C0,Xeld.C1 = CFrame.new(	0, 0.6, 0, 1, 0, -0, 0, 0, 1, 0, -1, -0),CFrame.new(0, -1.5, 0, 1, 0, -0, 0, 0, 1, 0, -1, -0)
	--Aujust the positions.



	
   return car

end 

Thats the code, All works as expected aparting from welding the player to the seat.

	local Xeld = Instance.new("Weld",car.VehicleSeat) -- makes a weld 
	Xeld.Name = "SeatWeld"
	Xeld.Part0,Xeld.Part1  = Xeld.Parent,	player.Character.HumanoidRootPart -- welds the parts
	player.Character.Humanoid.Sit = true -- makes the player sit
	Xeld.C0,Xeld.C1 = CFrame.new(	0, 0.6, 0, 1, 0, -0, 0, 0, 1, 0, -1, -0),CFrame.new(0, -1.5, 0, 1, 0, -0, 0, 0, 1, 0, -1, -0)
	--Aujust the positions

The exact code "sniped" that dose not work as expected.

Any question feel free to ask though pm on roblox or comment below, Username : DarkBeemo