Here's my suggestion to ur problem
First, verify your client if it reads lua files or lub.
1.Check the name of the data/texture/À¯ÀúÀÎÅÍÆäÀ̽º/"my_item.bmp" is the same name you put in idnum2itemresnametable.txt (example 1: 19524#my_item#) in addition the data/texture/À¯ÀúÀÎÅÍÆäÀ̽º/collection/"myitem.bmp" should have the same name also.
2.Check the drop sprite. The name of the drop sprite should be the same name with the item.(example 2: my_item.spr)
3. Check your accessoryid.lua and accname.lua located at data\luafiles514\lua files\datainfo. the item view that you'll have to put in your item_db.txt( 19524,My_Item,My Item,5,20,,0,,10,,1,0xFFFFFFFE,11,2,256,,20,1,"1005"<---this one, },{},{}) should be found in ur accessoryid.lua and accname.lua.
example 3:
accessoryid.lua
ACCESSORY_MY_ITEM = 1005
accname.lua
[ACCESSORY_IDs.ACCESSORY_MY_ITEM] = "_My_Item"