Make sure that if you are making a new scaling item, you also have to set the charmfileid field to something other than 0. I don't really know what the id number means, but without it, it won't scale.
Once you have it set properly, you will need to restart the server for the item changes to take effect. Then, once your item scaling is updated via the script, within about the next minute the stat updates will start showing automatically.
I made this wiki page a while back that might help:
http://www.eqemulator.net/wiki/wikka...akka=CharmFile