Add-on car modification problem

When i start up the server and spawn in a car non of the modification’s work like the roof, bumper ect. Lets use this truck as a example https://www.gta5-mods.com/vehicles/2012-ford-f150-svt-raptor when i spawn the truck in i won’t be able to add anything onto it like the camper on the back, but when i stop and start the truck resource using Easy Admin it allows me to access it and add the stuff like the camper on the back of the truck.

Just wonder if anyone knows how to fix this problem. Thanks.

Before i restarted the resource file.
https://gyazo.com/3004e0c1f105809aaca5526a8dbc103a

After i stopped and started the resource
https://gyazo.com/e3f6db865e36b2977d33221fff57e2e1

As you can see i have more options. (that for for the gtr)

Your game might still be downloading them or you just need to fix a couple lines in the meta files.

Also make sure your steaming them.