Accessing Controller with CRON

Thanks for pointing me in the right direction. But the reference in the Codigniter manual doesn't seen to work.
I used the example line for line as in the manual (copy/paste the Tools controller and placed in my app/Controllers root) I then modified my cron command

/usr/bin/php /home/my-app/mydomain.co.uk/index.php tools message to >> /home/my-app/app/Controllers/logfile.php
output = Status: 404 Not Found

Then I amended the Controller name in the command to match the controller name in the filesystem (Tools - capitalised)
/usr/bin/php /home/my-app/mydomain.co.uk/index.php tools message to >> /home/my-app/app/Controllers/logfile.php
output = Status: 404 Not Found

I then add the cli route as described:

PHP Code:

$routes->cli('tools/message/(:segment)', 'Tools::message/$1'); 


and used in conjubction with the command above.

output = Status: 404 Not Found

and, as per the documentation "Everything else works exactly like a normal route definition:"
I set the route to 

PHP Code:

$routes->cli('dosomething', 'Tools::message'); 


and my command to /usr/bin/php /home/my-app/mydomain.co.uk/index.php dosomething >> /home/my-app/app/Controllers/logfile.php
output = Status: 404 Not Found
Any thoughts?