HELP!!! FM20 CREATED FACES NOT WORKING

Can any one help me, I've created like 400 cutout faces for my games, but only a handful are showing when i reload skin. Any ideas why this might be the case? I've done everything right and some of the faces that showed previously are not showing any more.

Is there anything I can do to rectify this

Thanks

a) Put the new cuts in a separate folder, i.e. not the same folder as the megapack (if you're using it)
b) Don't create the config file manually but use fmXML to do it so as to avoid any manual input issues
c) Make sure that the UID/filename are the same as in your save game. Don't use the one assigned in the editor, because the one in your save game also depends on any other editor data files you may have and so the UID in the editor may not be the same as the UID in your save game.
d) Make sure the use skin cache button is unticked in your in-game preferences.

Thanks for the feedback, I've done that but what i get is that some of the faces work, but others don't.....
a)I didn't create a new config file, i copied the existing one in the original megapack and put in the new UID's in the config file and put both new faces and config file in a new folder.
b)The funny thing is that all the new faces i added worked initially, then after I added a couple more the issues started, even some of the faces that worked before stopped working...... I really don't know what else I could try