Fatal error when open my website!
 

when i open my website only thing that show is:
Fatal error: Class 'vB' not found in /home/stayre20/public_html/includes/vb5/template.php on line 129

I used hosting24 to host vbulletin. I edit the files like the tutorials says (I dont think v19 beta has the core options u need to edit in config.php)
I uploaded with filezilla the files i needed in /public_html
Then I open my website and then I get the error! What can I do?? :(:(