Yeah... You guys are not understanding the 20-digit codes. The first one you got was for beta or trial period or something.
There is another 20-digit code you got to plug in for the subscription. Check the Moogle site or something open it up and dig around for your 20-digit code.
What do I need to do exactly? Because I've been watching my e-mail for days now and have not received a 20-digit code and it's been about 5 days. I'm looking into this Moogle site right now.
Okay, so what NOBODY was saying was through the hard copy of the game, there's a code on the back of the manual. This entire time was thinking a 20-digit code was needed. I love being stoopid sometimes! :D