Why is my AI's script not detecting that its health is low?

Hey I just have one question about my AI, whenever I change the health that is below 54 it does not say "HURT" which it is suppose too, but it does not. It basically ignores it, and says "not hurt" when it is.

while wait(2) do
		local path = game:GetService("PathfindingService"):CreatePath()
		local human = script.Parent.Humanoid
		local torso = script.Parent.Torso
		local x = math.random(-20, 20)
		local z = math.random(-20, 20)
		local newPos = torso.Position + Vector3.new(x, 0, z)
		path:ComputeAsync(torso.Position, newPos)
		if path.status == Enum.PathStatus.Success then
			local points = path:GetWaypoints()
			for i, point in pairs(points) do
				human:MoveTo(point.Position)
		end
		script.Parent.Torso.ProximityPrompt.Triggered:Connect(function(plr)
			script.Parent.Humanoid.WalkSpeed = 0
			plr.PlayerGui.GUITest.Enabled = true
		end)
	end
	script.Parent.Humanoid.Changed:Connect(function()
		if script.Parent.Humanoid.Health <= 54 then
			print("HURT")
		else
			print("not hurt")
		end
	end)
end