dramabeats

I've tried several different downloadable cars both with and without ELS. Generally the siren works but the lights do not come on. On some models the textures do not load at all, this last time it turned the police car into a slick top. I use spark IV to add the cars and I've uninstalled/reinstalled the game multiple times. This happens with every car I download so I think I'm doing something wrong? Also when I turned the siren on the game crashed.