Sims 3 Serial To Register Online My Serial Code For The Sims 3 Wont Work When I Register Online But Worked When I Installed The Game!?!?!?

My Serial code for the Sims 3 wont work when i register online but worked when I installed the game!?!?!? - sims 3 serial to register online

I do not know why it does not work! I do things, the stock market, but I can not because the line custom work of code! I do not know what is wrong! Please help!