how to delete old gmail account.???

There is no point in deleting the old account. You just stop using it. I have many email accounts and as each one builds up with spam I just open a new account and then stop using the old one. If you reply to your friends with your new account, eventually they will start to use your new account as well.

Hi you can delete through the settings. But still if you have problem, just mail to gmail admin, they can help you..