One of the following may be happening:
- You're still using your DoubleClick sign-in information, but you've already updated. Click the Sign in with your Google Account link and enter your Google Account sign-in information on the page that appears.
- You're on the Google sign-in page instead of the DoubleClick sign-in page. Click the Sign in with your DoubleClick Account link and enter your DoubleClick username and password on the page that appears.