Disc Authorization Failure -__- [SOLVED]

So I have downloaded the Sims 3 Base Game and Generations. The Base Game was working fine before I installed Generations and now I'll get past the Generations background screen and I'll get all the way to New Game Menu and then an error will pop up that says, “Disc Authorization Failure. We are unable to verify that your disc is a valid copy of The Sims 3. Please contact customer support.” And I am stumped as to how to make this game work. I followed the Installation Instructions and I don't know what else to do.


//EDIT


Here are some pictures:

Hello,

Please re-do step 2 to 4: https://games4theworld.forumotion.com/t1171-must-read-how-to-install-the-sims-3-correctly
DO NOT skip any steps and read very carefully!

I tried that last night. It worked. Thanks(:

Hello,

Glad to hear it did!
Enjoy the game now and please let us know if you run into any more problems!