Magento Admin login kicks me out back to the Admin login

Question

After I enter my username and password and click \"Login\" it sends me back to the Login page with NO error messages. The URL changes to include a session key and that\'s it

Answer 1

Clear the contents of the directory var/cache and try again.

If that doesn't help check the table core_config_data in the database for records with a path value of "web/secure/base_url", "web/unsecure/base_url" and "admin/url/custom". These should match the page you are trying to log into (but without "index.php/admin/" at the end)

Finally check your browser's cookie settings and that the server's PHP is able to set cookies.