I'm having the same issue. My son has an xbox 360 with an offline profile. I'm trying to convert that to a live account. I tried signing up for the live account from the console and was unable to continue because of the age restriction. So I went online and eventually figured out how to create a child live account (an unnecessarily cumbersome process). I then logged back into the console with my son's profile and tried to sign in to the live account. That just takes me back to the profiles screen. So I logged into the profile again and tried to sign up for xbox live. I was able to complete the sign up process but received an error about the email address being associated with an existing account. So, does anyone know the exact steps I need to follow to convert my under-13 son's offline profile to an xbox live profile. This really shouldn't be so difficult.