custom sims and community lots

[georgesafe]

Hi... I have a problem with my custom sims. When they come into a community lot, the game crashes. There isn't any problem with my main sim. It also is a custom sim which made of downloaded custom content. But the custom neighbours of my sim cause the game crash if they come into the downtown or the other community lots. I have all of the EP's. What can I do to fix this problem? Thank you...