I've similar problem, on Configuration i've this warning:
Warning, the Safe Path is WRONG, for safety reasons it is very important to create a folder in a path not accessible by an URL, create also a folder invoices in it to store your sensible data secure. Our suggested path is for your system /var/www/vhosts/web.cavinato.com/vmfiles
I've created this vmfiles folder but the warning is still here !
what's wrong ?
i've PHP 5.3.2 , Joomla 2.5.4, Virtuemart 2.0.6
Thanks for help