Help with Sims 2 on Windows 7?

Remove it completely then reinstall it, like you did before. then whenever you play the game, you have to keep the cd in the drive. Whenever you add another sim game to your collection you have install and keep the latest disk in the drive. I think that's the problem. Oh! and let's say u have double deluxe, then u add apartment life, you have to click on the apartment life icon to drive, and make sure the apartment cd is in the drive. I hope that works :) One last thing, of course your computer is going to ask if you want to make changes everytime the cd is in the drive, just say not and keep playing.