Sorry but on server i play, just have treasure chest... (with HP, when open, drop adena and enchants, when fails to open drop things like a mob). I think box and chest are same thing...
Well, i tried on server l2off c4 i got a ds+10(I enchant to +5 a day, +7 another and rest 1 week later), homu +10 same process, emi +7 (I cant enchant more +7 always broke) sls*sls +8 (but i broke 1 trying to enchant +5 Oo?) well, to me this exploit work, thanks