When i create custom items.. i think of the type of item its going to be like.. if im trying to make a note i would go to
http://eqitems.13th-floor.org and search for a similar item im making.. find it and look at the RAW data like this..
http://eqitems.13th-floor.org/itemraw.php?id=18203 then just copy the same values.
your problably just missing a -1 or something in a certain field..
hope this helps a bit hehe..