Why isn't this doing damage when it touches one of these parts?

It's supposed to do damage when an enemy touches"hs" or "hss"

hs.Touched:connect(function(dmg) -- if you touch this
			hss.Touched:connect(function(dmg)-- or this it does 10 damage but it no do that :c
            if dmg.Parent:FindFirstChild("Humanoid")~= nil then
	if dmg.Parent.Name ~= plr.Name then
	dmg.Parent.Humanoid:TakeDamage(10)
		hs:Remove()
				hss:Remove()
	end
end
		end)
		end)

You need to define hs and hss. That is also called making a variable

Example:

Baseplate = game.Workspace.Baseplate 

For more info on variable visit

http://wiki.roblox.com/index.php?title=Variable

Well, assuming that all the variables are not nil (are defined) then this should work perfectly fine. I'm not 100% sure why your original script did not work, but I have an idea. Oh well, try this:

hs.Touched:connect(function(dmg) -- if you touch this
    if dmg.Parent:FindFirstChild("Humanoid")~= nil then
		dmg.Parent.Humanoid:TakeDamage(10)
		hs:Remove()
        hss:Remove()
	end
end)
hss.Touched:connect(function(dmg)
	if dmg.Parent:FindFirstChild("Humanoid")~= nil then
		dmg.Parent.Humanoid:TakeDamage(10)
		hs:Remove()
        hss:Remove()
	end
end)

Oh and please, could you use code indentation next time for making it easier for people to read your script (I hope this doesn't sound like I'm acting aggressive towards you)? Thank you.