While Loop not functioning as intended, why?

Hey y'all, my server script inside a part in the workspace is supposed to check if the player has a specific leaderstat value, in this case, that value's name is Door1, and if it's greater than or equal to the required_points variable.

I have a GUI that pops up On touch of the part, which works properly, if the player doesn't have the required_points value. And the Buy button script works properly, and it changes the value (+1 from current value). As well, the ServerScript inside of the part in the Workspace works properly as well if the player ALREADY HAS the specific value.

What I am asking, is why when the player buys the area(buying the area just changes their leaderstat Value which is Door1), the script won't detect that the players value has been changed, and make the Parts CanCollide false for that player.

Any and all help is appreciated! Scripts posted Below!

SERVER SCRIPT

local required_points = 2
local db = true
while true do
	wait(1.5)
		script.Parent.Touched:Connect(function(hit)
		if hit.Parent:FindFirstChild("Humanoid") then
			local player = game.Players:GetPlayerFromCharacter(hit.Parent)
			if player.leaderstats.Door1.Value >= required_points then
				if db then
					db = false
					script.Parent.CanCollide = false
					db = true
				end
			else
				if player and not player.PlayerGui:FindFirstChild("buydoor") then
        		local cloneui = script.buydoor:Clone()
        		cloneui.Parent = player.PlayerGui
        		cloneui.Frame:TweenPosition(UDim2.new(0.25,0,0.2,0))
wait(1)	
				end
			end
		end
	end)
end

LOCAL SCRIPT INSIDE TEXTBUTTON IN GUI

local player = game.Players.LocalPlayer
local leaderstats = player:WaitForChild("leaderstats")

script.Parent.MouseButton1Click:Connect(function()
	if player.leaderstats.BrickBux.Value > 1 then
	wait(2)
	script.Parent.Text = "Purchased!"
	player.leaderstats.Door1.Value = player.leaderstats.Door1.Value + 1
	player.leaderstats.BrickBux.Value = player.leaderstats.BrickBux.Value - 150
	wait(1)
	script.Parent.Parent.Parent.Frame:TweenPosition(UDim2.new(-0.5, 0,0.3, 0))
	wait(1)
	player.PlayerGui.buydoor:Destroy()
	else
		script.Parent.BackgroundColor3 = Color3.fromRGB(255,25,25)
		script.Parent.TextColor3 = Color3.fromRGB(255,0,0)
		script.Parent.Text = "Failed!"
		wait(1.5)
		script.Parent.Parent.Parent.Frame:TweenPosition(UDim2.new(-0.5, 0,0.3, 0))
		wait(1)
		script.Parent.Parent.Parent:Destroy()
	end
end)