ido to return to classic emai want to return to classic e mail but cannot why is this?

Near the upper left of the page where it says your screen name on top of the words sign out, my account, mail classic, click the mail classic link.

Under where it says "Welcome, yourname" at the top of your Yahoo! Mail page, there's a "Switch Back" link. Click "Switch Back" to go back to the Yahoo! Mail version you're already familiar with.

Or try one of these links to switch back to Classic:
http://us.f504.mail.yahoo.com/dc/troub...
http://us.mg1.mail.yahoo.com/dc/optout...