Sorry. Go to this page first:
http://ayu2.avexnet.or.jp/w.html
First box is the 14 digit number.
Second box is your email.
Third box is your ID.
Click the left button.
After you get the email from avex confirming your ID, you should be able to log in using it here:
http://ayu2.avexnet.or.jp/special/