Car addons for server. SCars.

I have a DarkRP 24 slot server and recently I’ve been having trouble with Car addons.
The Dodge Charger 1969 version works fine, I have the models/materials/sounds all in the resources.lua and use a resource generator and all that, but it seems anything like TDMcars or SCars just keeps coming up as Error signs. I don’t know how to fix this, I have all the models and what not so you download them when you come on to the server, but yet it still shows error signs. If someone could help me so the SCars could work on the server, or TDMcars it would be greatly appreciated.

I recently posted this in the wrong area, so I made a new one in the help/support section.