Projectile Models not working?

hello everyone!

i hope you're having a great day.

anyways, i am trying to create a staff, the "Glistaff" that shoots the "glisteningsphere" projectile. i set the custom model to the glisteningsphere texture, but when i tested it on the client, it shot the glistaff texture instead. i went back into the code and realized that the projectile model was set as default, but when i clicked it, the custom option didn't appear. help!