Thank you very much for your quick response, Yuxi, but the same thing happened again. I wouldn't have asked if I hadn't tried everything I know and if I hadn't wanted to play this lot so much. I still don't know what's wrong.
But thank you again and I'm really looking forward to more lot downloads - hopefully I will be able to see them in my game too! - your interiors (and exteriors) are amazing as well as bodyshop stuff!