I'm sorry about the issue. Do you mean you created a new yahoo email address? What do you need a new email account for?
What exactly happens when you sign in your old yahoo email address and password? Is there any error or message?
Do you have windows xp, vista, or 7, or 8, 10, or mac computer?
Please reply at the box below. Thank you,
Who is your email provider? AOL, Gmail, Hotmail or Yahoo?