12
Feb
Try the following steps,
1. Try accessing your admin using your ip (if it is localhost, try 127.0.0.1).
2. If you cant get around with the above step then as a last step try the following,
Navigate within your Magento database to the MySQL table core_config_data and look for a row with the field path set to the valueweb/cookie/cookie_domain. There might be multiple entries, but the one with the scope_id set to 0 should be matching the domainname you’re using to access Magento.
3. Another problem could be that the so-called Secure URLs and/or Unsecure URLs do not match the current hostname.
In the same MySQL table core_config_data you might find various entries with path starting withweb/secure/base or web/unsecure/base. These also need to point to the right hostname. Note that the number of occurances could range from 0 (nothing configured) to 10 (everything configured).
