I've just acquired an account on a remote server with Joomla installed. I was instructed to add xxx.xx.xxx.xx name.ca www.name.ca to the hosts file which I found in /private/etc/ . I had to su to my admin account and use sudo to mod file and found that hosts is also found in /etc/ though it is apparently the same file. I attempted to flush the the DNS cache using dscacheutil -flushcache and then launched Safari and entered address xxx.xx.xxx.xx/administrator but got a 404 error.

Joomla was set up for me by the server owner and accessed from his Windows laptop to demonstrate so I know it should work but no go here. Can anyone suggest what the problem might be?