DarkRP - What am i doing wrong?

I tried to make the airboat seat buyable to add to their cars, so their buddies can ride with them, but what am I doing wrong?

I added this:

AddCustomVehicle("Car Seat", "models/nova/airboat_seat.mdl", 500, {TEAM_CAR})

to the addentities.lua and when I become a Car Dealer (TEAM_CAR), i try to buy the seat and it won’t spawn. Any suggestions? thanks.

Here, a passenger seat mod for you:

Type “rp_getvehicles” in console, make sure “Car Seat” is in there, the first string in AddCustomVehicle should be a valid string from the rp_getvehicles list.