[RESOLVED] GetPropertyChangedSignal and/or Changed not working?

I'm trying to script a block that destroys itself after the IntValue inside of it reaches the number 2. The following code is in a Script which is placed in the IntValue. I included the wait statement in case the problem was just that something didn't load, but that didn't fix it. There are no error messages. Nothing happens in output, so the function just isn't running. The block doesn't destroy itself even when the IntValue reaches 2.

block = script.Parent.Parent
dmg = script.Parent

repeat wait() until dmg ~= nil

dmg:GetPropertyChangedSignal("Value"):Connect(function()
	print("changed")
	if dmg.Value >= 2 then
		block:Destroy()
		print("destroy")
	else if dmg.Value < 2 then
		print("safe")
	end
	end
end)

Any help is super appreciated.

I resolved this by moving everything into one script. Rather than using an IntValue, I made a local counter value that destroyed the block after it was reached within the tool's script. This has some bugs to be worked out such as random blocks I don't want to be destroyed being included, but I'll figure that out shortly. Thanks to everyone who helped!

--- VARS ---
local tool = script.Parent.Parent -- refers to tool container
local player = game.Players.LocalPlayer -- finds local player who's running game
local mouse = player:GetMouse() -- finds the players cursor
distance = 8 -- distance you need to be from block
local num = 1 -- baseline amt of damage dealt
debounce = false
local dmg = 2 -- total dmg before destroy
local counter = 0

--- DAMAGE ---

tool.Activated:Connect(function()
	if mouse.Target ~= nil and debounce == false and mouse.Target.ClassName == "Part" 
	and (mouse.Target.Position - script.Parent.Position).Magnitude < distance then
	debounce = true
	wait(.75)
	debounce = false
	counter = counter + 1
	print(counter)
	end
end)

-- DESTROY -- 

tool.Activated:Connect(function()
	if counter >= dmg - 1 then
		mouse.Target:Remove()
		counter = 0
	end
end)