Phpbb3 admin login problem

Admin Login Page For Phpbb3:

1. To Login into admin section you have to re-authenticate for admin account
2. First you have to login from frontend with admin details
3. Then you found "Registered users: admin" like this. when click on admin link the page move to related link where can find the below options
4. Username:admin [ Administrate user ] [ Banning ]
5. Click on " Administrate user" you found the admin login page from where you can login to your admin account by providing your details.

The admin URL is like this http://yoursitename/adm/index.php ( if it is localhost like this http://localhost/phpBB3/adm/index.php")

Admin login page like this "http://sitename/adm/index.php?i=users&mode=overview&u=2&sid=488e632c4df5103d5d1961f31321b251"