Item Limiting Problem

Supposedly, RM2K3 lets you limit item use to certain classes as well as heroes. In my class-change game, this is the feature I need. However, the game doesn't seem to care about the restrictions I place on item use by class. Why could this be?

Uh..u are prssing apply right?
And if there's a tick its usavble by that class so...check that too..or redownload it...

In the items section, there should be boxes next to character's name on the item you've selected. If you want them to be able to use it , press the box with a check mark.

If you set it so certain heros can use it, it doesn't care what class they are.