Why isn't my :GetPropertyChangedSignal() Firing?

I am making a part of my in ServerScriptService that updates the DataStore for player leader boards. It is displaying the leaderboard's data correctly though when I use :GetPropertyChangedSignal() and change the players Coin Multiplier from the server it does not detect that. I am getting no errors in the output. Here is my script:

print("Connecting") --Prints
game:GetService("Players").PlayerAdded:Connect(function(plr)
	plr:WaitForChild("playerVariables"):WaitForChild("PlayerRebirthMulti").Value:GetPropertyChangedSingal("Value"):Connect(function()
		print("Changed") --Doesn't print when player's Coin Multiplier is changed.
		local UserInLeaderboards = false
		for a = 1, 15 do
			if plr:WaitForChild("playerVariables"):WaitForChild("PlayerRebirthMulti").Value > leaderstatsUserValues[a] then
				for b = 1, 15 do
					if leaderstatsUserNames[b] == plr.Name then
						UserInLeaderboards = true
						table.remove(leaderstatsUserNames, b)
						table.remove(leaderstatsUserValues, b)
						table.insert(leaderstatsUserNames, a, plr.Name)
						table.insert(leaderstatsUserValues, a, plr:WaitForChild("playerVariables"):WaitForChild("PlayerRebirthMulti").Value)
					end
				end
				if UserInLeaderboards == false then
					table.remove(leaderstatsUserNames, 15)
					table.remove(leaderstatsUserValues, 15)
					table.insert(leaderstatsUserNames, a, plr.Name)
					table.insert(leaderstatsUserNames, a, plr:WaitForChild("playerVariables"):WaitForChild("PlayerRebirthMulti").Value)
				end
				game:GetService("DataStoreService"):GetDataStore("LeaderboardRebirthMultiUserNames"):SetAsync(0, leaderstatsUserNames)
				game:GetService("DataStoreService"):GetDataStore("LeaderboardRebirthMultiUserValues"):SetAsync(0, leaderstatsUserValues)
			end
		end
		UserInLeaderboards = false
	end)
end)
print("Connection Complete") --Prints

This script is a Normal Script in ServerScriptService. I've tried other solutions as putting connecting :GetPropertyChangedSignal() To the variable when setting it but it errors saying: GetPropertyChangedSignal is not a valid member of IntValue.

replace the third line with

plr:WaitForChild("playerVariables"):WaitForChild("PlayerRebirthMulti"):GetPropertyChangedSignal("Value"):Connect(function()

it works like this instance:GetPropertyChangedSignal("ThePropertythatchangesOfThat instance")

also intValue has already a changed event, so this would be even better:

plr:WaitForChild("playerVariables"):WaitForChild("PlayerRebirthMulti").Changed:Connect(function()