Sims 3 - Generations Disk

Hello,

I downloaded and installed the Sims3 and several expansions to the T. I also followed the instructions for the Fix, and applied them to each designated folder.

The game is updated properly, but when I attempt to play, I get the "Please insert the Sims3 Generation disc before proceeding" error. This strikes me as odd, because the last expansion I installed was Master Suite.

I'd greatly appreciate some guidance - this is my second time around installing everything (realized I had done it incorrectly the first, deleted it all then followed each instruction text).