Just instead of putting code into mods.prop, insert it in other which you have, npcs, players etc.
And if you have such code
Change mods -> players, that's all.
It seems to me that you don't. If so, while creating the item in-game, he should have a message 'The item doesn't exist'. But as he said, he has the item but has no name.. So, he have to put it in correct place in itemname-e.dat
It happens when you put in wrong place the code in itemname-e.dat.
The file is separated for 3 parts, armor, weapon and etc. So, simply you have to paste it in correct category.
Find the icon (item) which you want to use, alt + g, type the name -> Item Search -> you got the ID -> open etcitemgrp.dat via L2FileEdit -> find ID of the item -> scroll right and there you have icon.etc_potion_clear_i00 :)
#Delete ALL mobs UNDER 40 lvl:
#Code:
DELETE spawnlist, npc FROM spawnlist, npc WHERE spawnlist.npc_templateid=npc.idTemplate AND npc.level<40 AND npc.TYPE='L2Monster';
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Here you can find more useful SQL scripts, CLICK - say thanks to Chr.Trance :D
Well, maybe would you tell us what have you done (what have you add and so on)?
What error ingame do you see.. Problems may be multiple
We rly cant read in your mind :)