Some cars are not supported or make the game crash. If my memory serves me right, some of those cars are the Haitian VooDoo, (with hydrolics), the cuban hermes...umm maybe be 1 or 2 more. Also, try to space your cars out a lil. I've had probs in the past when placing tons of cars in the same place, or tons of cars that are of the same model. There's also a limit to how many cars you can place ingame. I think it's 200. Try erasing a few of your cars (saving them aside so you don't lose thier place) Whitle it down to like 150, check if the server works, then add 10 checking if the server works, and so on till it crashes. I'm pretty sure it's 200 tho.