When I try to follow the steps exactly I get this error
Warning: main(.//functions_vbiupgrade.php): failed to open stream: No such file or directory in /home/digitech/public_html/forum/admincp/vbiupgrade.php on line 57
Fatal error: main(): Failed opening required './/functions_vbiupgrade.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/digitech/public_html/forum/admincp/vbiupgrade.php on line 57
That means you don't have vbiupgrade.php uploaded to your ACP directory.
Do so, and try again.
It is already there along with the other files
See below
its not a functions file.... this means it doent have a functions_ prefix.
Sorry I had already sorted it, I should have posted that earlier.