To find out why your AdSense account can't be activated, either sign in to AdSense or read the email we sent you. The main reasons why we can't activate an account are described below.
There's a problem with your site's content
Review the AdSense Program policies to make sure your site is in compliance. Keep in mind that we may review all pages of your site, not just the sign-up URL where you placed the code. After you've adjusted your content, sign in to AdSense and confirm that you've resolved the issues on your site. We'll then proceed with activating your AdSense account.
You have two accounts
AdSense policies only allow one account per publisher. If you receive an email from AdSense saying your account can't be activated due to a duplicate account, you need to close your other account, sign in to AdSense and confirm that it's closed. We'll then proceed with activating your AdSense account.