I don't use a cron job myself, although it's on my "to do" list to setup.
Did you read
this thread? That might offer some help.
Another option, and not a very good one, although I suppose it would work in a pinch, is to set the value of PHPDIG_ADM_AUTH to zero in the config.php file. Of course, that's going to let anyone into the admin panel.
This is really a "Charter" kind of question, if no one else is going to respond. He's been missing in action for a few days, I think (I hope) because he's working on the next build of phpdig.