Re: code does not work - the sims 3

registering the game, it doesn't work. The same thing is happening and I saw that someone said that if you bought the game off the site then you're already registered but it still won't let me log into the sims 3 game launcher I keep having to register and when I register it says my code is invalid

You are correct.  If you bought the game off of Origin, then it is automatically registered for you on the Sims site.  However, it can take some time for it show up on in the Sims community.  If you read through the posts below, it'll explain what you should've done to register and what steps you need to take if the game still isn't showing up on the other site: 

-- http://answers.ea.com/t5/The-Sims-3/Information-How-to-Register-The-Sims-3/m-p/387162
-- http://forum.thesims3.com/jforum/posts/list/656133.page
-- http://forum.thesims3.com/jforum/posts/list/655809.page


If you're still having issues after that then you should contact EA here-- https://help.ea.com/contact-us. Only they can help with account issues.

Best of luck