Have you ever tried to update akeebabackup or other component via ftp and not been able to ? If so follow these simple instructions:

1. First of all you have to change permissions on configuration.php from 444 to 777

2. Go to Global Configuration > Server Tab > Enable FTP settings

3. Enter your FTP details

4. Save Global Configuration

5. Remember to change permissions back to 444 on the configuration.php file