I have ownclod 9.02 and vtcron as well as Perl and phpmyadmin. 
My problem with the server is you need a cron job to run every 15 mins. 
The default is Ajax but only works when you change a page or menu setting.  
The other is web based but I cant get that to work either using my ddns link. 
The final version is to use cron daemon.  I know that vtcron isn’t a cron daemon from what I have read. 
What I have done is set 15 mins in the main page.   I then set the link to the cron.php file as per the owncloud instructions ie /mnt/HD/HD_a2/owncloud/owncloud/cron.php.
The problem is that vt cron doesn’t run or set in motion the cron job in owncloud.  
The problem is that owncloud grinds to a halt with one person after a while.  I need 2 users so need to convert to MySQL and to get the cron jobs working. 
I am using the most recent version of vtcron 1.03. 
Any ideas?
Thank you.