I found some errors in the code that broke the Item Maker function.
Can you see the difference between:
22001,My_Custom_Item,My Custom Item,5,1000,,100,,,,,0xFFFFFFFE,7,2,136,,,,,{},{},{}
And this:
22001,My_Custom_Item,My Custom Item,5,1000,,,100,,,,,0xFFFFFFFE,7,2,136,,,,,{},{},{}
Yes, a single character makes a lot of difference! That single character makes the custom item to be useless at all...
But now it has been fixed, and I decided to use a "Ketupat" item sprite as the default, the reason I choose it is because it uses latin letters rather than Korean letters, so I assume it will be safe to use on any client version.
Any ideas and suggestions are always welcomed