Addons NOT showing up in Multiplayer

Just as the title states SOME of my addons wont show up in mutliplayer…specifically ANY:

Vehicle Mods
NPC Mods
Player Models

They show up in single player, but not in multiplayer and by multiplayer I mean if i make a dedicated server…why is this?

And NO my copy of gmod is NOT a Torrent/Pirated copy, I bought mine from steam and so did my friend.

Any ideas?/suggestions?

So they aren’t working if you join your own server?

Did you copy all of your addons to the dedicated server?

if you join a server that doesn’t have these addons, they wont work

edit:
if your trying to use it in your own dedicated server make sure that they are in your dedicated servers registry (almost like having a second gmod)

Ohhhhhhh lol I didnt know about the dedicated server and yeah…lol I feel dumb

Thx for all the replies! :smiley: