How do i add a custom item ?

[L-Jam]

I did what the info told me to do and when it shows up in the game it won't let me wear it and logs me out . The pic was an X and I put the pics for it in the right folders .

 Please Help .

[Olrox]

All you need to know about custom items ---> http://rathena.org/wiki/Custom_Items

[L-Jam]

Thanks You !!