Monster Desappear

Hello,is the following, I'm trying to edit a few drops in RYL and when i can finally edit, the mobs drops everything right, what do I really want, but when i search the mobs appears only the name, the mob not appears, only is his name flying, the mob does not appear in some way, someone could help me?

Thank you ...

did u get any errors after that ?

No one, why? the mob does not appear in some way do u have any idea?

make sure on gsf have same on txt file ..
i hope its helping you ! XD