"Unknown Error Occurred" message pops up whenever I try to open my game... After uninstalling the sims 3 along with all of my expansion/stuff packs and worlds to get rid of all the glitches, I began to reinstall everything (in the order of the release date) and after each install I would open the game to make sure everything works properly, which it did, until I tried installing Ambitions, I noticed that the Ambitions game would not show up in the Sims 3 folder of my applications like every other EP did after installation and then when I tried opening the game an "Unknown Error Occurred" message pops up, so I uninstalled it and when I launched the game it worked, installed it again and that same message popped up. I skipped over Ambitions and continued downloading the rest of my EP successfully and then the same thing happened to me after I tried installing Outdoor living stuff. I have no clue why this is happening and it is driving me crazy. Please help!!