If i recall correctly, it seems like this hosting HostGator is quite easy to configure the cronjob, perhaps you can provide us with your HostGator cpanel access so we can help you setup this?

Thanks!

I've added the cpanel credentials to the website login information.

Tony

I already help you setup cronjob on your server, please have a check.

[gist type="php"]
/usr/bin/wget -O /dev/null "http://www.ncagg.org/index.php?option=com_easydiscuss&task=cron"; >/dev/null 2>&1
[/gist]