Sims 3 launcher said disc not found?

When I open my sims 3 launcher(start-up window) it tells me disc not found, please insert sims 3 disc. I've tried putting all my discs and it said the same thing. I downloaded generations, world adventures, fast lane, and high end loft all in one day, today. They were my friends codes and discs. The sims 3 site said you can use codes as much as you want, so that's probably not is. I've tried again and again and again. Yes there's a disc in. PLEASE HELP!!!!!!!!!!!!!