AlexT
If you are a few versions behind, then you need to apply each upgrade incrementally:
http://www.boonex.com/trac/dolphin/wiki/Dol7Upgrade
 
 
Below is the legacy version of the Boonex site, maintained for Dolphin.Pro 7.x support.
The new Dolphin solution is powered by UNA Community Management System.
PET:0.095839023590088