Custom item not appearing for others

[Acies]

I have had this happen due to the process I had of importing things previously. I created something placed it in a folder and made an .ent file. Then copied the object to where I wanted it to be. The .ent file was still pointing to the old location of my models. Perhaps the .msh or .ent points to a folder which only you have on your computer?

Open in notepad and have a look.