Time Arithmetic error

[shadowman110]

function AddDonator(steamid, time, ply)
	 if !IsValid(ply) then return end
	 if !time then return end
	

>>         time = tonumber(time)
>>         time = time * 60 * 60
>>         time = os.time() + tonumber(time)

	
	 mysql.query("INSERT INTO donator (steamid, time) VALUES ('"..steamid.."', '"..tostring(math.Round(time)).."') ")
	 DB.Donator[steamid] = {["time"] = time}
	
	 ply:SendLua("chat.AddText(Color(255,0,0,255), 'Der Spieler mit der SteamID:"..steamid.." hat nun fuer "..time.." seinen Donatorstatus!')")
 end

local function AddDonatorz(ply, cmds, args)
	if !ply or !IsValid(ply) then return end
	if !args[1] or !args[2] then return end
	
	AddDonator(args[1], args[2], ply)
end
concommand.Add("AddDonator", AddDonatorz)

]

[ERROR] lua/autorun/server/myqlconnect.lua:102: attempt to perform arithmetic on local 'time' (a string value)
  1. AddDonator - lua/autorun/server/myqlconnect.lua:102
   2. unknown - lua/autorun/server/myqlconnect.lua:118
    3. unknown - lua/includes/modules/concommand.lua:69

and im using this [url]http://facepunch.com/showthread.php?t=1220537[/url]
i get some lua errors about try to perform arithmetic time (a nil value)
i dont know how to fix it
its marked with >>

[Pandaman09]

First, I would post in the Lua section, since this is lua.
Second, We need the exact error so that we know what's wrong.
Also, what mysql module are you using?

[editline]26th February 2013[/editline]

Is time a string? Your not checking to see if time is valid before multiplying it.

[shadowman110]

ok i updated