problems with vbookie

[alanduke]

Having foillowed the instructions and having vbookie options appear in the vbulletin options...the site seems to work until you try and view a thread...comes up with this:

Warning: Unknown(/home/m/a/marks/public_html/includes/functions_vbookie.php): failed to open stream: No such file or directory in /showthread.php(96) : eval()'d code on line 1

Fatal error: (null)(): Failed opening required '/home/m/a/marks/public_html/includes/functions_vbookie.php' (include_path='.:/lib/php') in /home/m/a/marks/public_html/showthread.php(96) : eval()'d code on line 1

any help appreciated

thanks