Cron job ERROR 404: Component not found

Hi,

I have set up my cron job and it sends me emails but always with an error message as follows:



--2013-08-17 12:50:02-- http://mysite.com/index.php?option=com_invitex&task=mailto&pkey=xxxxx
Resolving mysite.com... xx.xxx.xx.xxx
Connecting to mysite.com.uk|xx.xxx.xx.xxx|:80... connected.
HTTP request sent, awaiting response... 404 Component not found
2013-08-17 12:50:02 ERROR 404: Component not found.

This is exactly what is currently in my cron job command line:

/usr/bin/wget -O /dev/null "http://mysite/index.php?option=com_invitex&task=mailto&pkey=xxxxx" > /dev/null

Should I be adding a key to where it says pkey=xxxxx?