Few suggestions, try clearing your internet browser, logging in and out of your account use firefox or IE. The web does give some people some trouble with chrome. If that does not work some people have suggested changing your password on origin will trigger origin to sync with the sims 3 web.
Also downloading form the exchange can be dangerous. Its at your own risk. You may get unwanted bad cc in your game. I can't post a link but google delphy's dashboard.
