add cronjob to run a page on a website

[md@waw.co.uk]

I understand that to add a cronjob I use crontab -e

I want to send emails to customers once a day, I have the page set-up & if I open the page in a web browser it works.

the path is /home/www/web(number)/web/auto/mail.php

I added this to the crontab

00 01 * * * /home/www/web(number)/web/auto/mail.php &> /dev/null

I think this will run at 1am every day - but it doesn't work.

Can you tell me where I'm going wrong please.

I have set CHMOD to 777 for the file mail.php

Thanks