The script is only referring to an object ?

I'm doing a script for when I give a punch the player damage the dummy and cause a different sound, but this script only works with just a dummy, the other 3 are not suffering any change out, what should I do?

Sorry with my English

The Script :

for i,v in pairs(game.Workspace:GetChildren()) do
	if v:FindFirstChild("Humanoid") and v ~= script.Creator.Value and v:findFirstChild("Torso") then
		if (v.Torso.Position - script.Parent.Position).magnitude <= 5 then
			v.Humanoid:TakeDamage(script.Damage.Value)
			local Sound = Instance.new("Sound", script.Parent)
			Sound.SoundId = "http://www.roblox.com/asset/?id=131237241"
			Sound.Volume = 0.3
			Sound.Pitch = 1
			Sound:Play()
			wait(1)
			Sound:Destroy()
		else
			local Sound = Instance.new("Sound", script.Parent)
			Sound.SoundId = "http://www.roblox.com/asset/?id=508243106"
			Sound.Volume = 0.2
			Sound.Pitch = 1
			Sound:Play()
			wait(1)
			Sound:Destroy()
		end
	end
end