So I installed Sims2, Sims2 nightlife, Sims2 university and Sims2 Business but when I installed Sims2 Pets, the walls of the lots turned red and flashing aswell as the pool. I uninstalled pets and the walls turned back to the normal colour, but all my families disappeared and the game reset. Later on, I installed Sims2 Pets again and the walls began to turn red and flash. I want the walls to turn back to their normal colour and stop flashing but I have a five generation family and I don't want them to disappear. What do I do?

Video Game Consoles & Games - EA - Electronic Arts - The Sims 2: Pets