- what are your current cookie settings (Admin Panel --> General Admin --> Configuration)?
How to backup/restore with www.phpmyadmin.org
- phpmyadmin --> click on the database name (below "home") --> scroll down to "View dump (schema) of database". Mark all tables in the list. Check "structure and data". Check "add drop tables" , "complete inserts" and "save as file" (you may use compression, but if your database is pretty big, you will probably get a timeout).
To restore from the backup file, point phpmyadmin to the file on your harddisk.
you have shell access to your server (telnet / ssh), take a look at this topic: http://www.phpbb.com/phpBB/viewtopic.ph ... =mysqldump