Modpack dosent show for others

[Aragorn_The_King]

Hello, My friend has recently made a modpack for our server and we have been using it and running the pack just fine. Keeping it updated and stuff. But recently his computer has been crashing alot so he transfered the ownership to me. The odd thing is now that when others deleted the pack to reinstall and update, the pack dosent show up anymore if they do that. Its not in Hide/Hidden Mode. Usually since the best way to update the pack if mods are taken out or added in is to delete the pack, close the launcher, and reinstall the pack. 

So what im trying to ask is.. How do i get my pack to show up for others, when its not doing it now like it used to?