vBSEO error in error log

After php upgrade i started to receive error's related to vbseo in my error log.
When i try to browse my vbadvanced homepage /index.php) the page shows blank and when i check my error log here is what i get :

Code:

[Mon Feb 26 05:58:00 2007] [error] PHP Warning:  main() [<a href='function.include'>function.include</a>]: Failed opening '/home/serenity/public_html/' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/****/public_html/vbseo.php on line 861
[Mon Feb 26 05:58:00 2007] [error] PHP Warning:  main(/home/****/public_html/) [<a href='function.main'>function.main</a>]: failed to open stream: No such device in /home/****/public_html/vbseo.php on line 861

Whenever i browse to my vbadvanced page i get the same error.

Hello Mert,

can you compare those entries with your access log (using the data/time of request) to find out which URL causes that?

index.php is causing the error (vbadvanced cmps)

What is your setting for "File not found handling" option in vbseocp?

I have this 404 page not found installed.

Please open a support ticket with ftp access to check this further.