Error when signing guestbook

Hi, I run a website, and recently upgraded the guestbook to 2.3.3 in CPanel (although not sure if it actually did, since the gbook still says 2.3.1 on the bottom), and since I did, you get an error message when you try to sign it. The link is http://www.180mosquito.ca/gbook/index.php.

If you click on "sign the guestbook" you get:

Warning: main(/home/mosquit/public_html/gbook/lib/add.class.php): failed to open stream: No such file or directory in /home/mosquit/public_html/gbook/addentry.php on line 9

Warning: main(): Failed opening '/home/mosquit/public_html/gbook/lib/add.class.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/mosquit/public_html/gbook/addentry.php on line 9

Fatal error: Cannot instantiate non-existent class: addentry in /home/mosquit/public_html/gbook/addentry.php on line 11

I'm pretty new with all this, and hopefully it's an easy fix, thanks in advance for any help.

Here is one of your clues. No such file or directory

Apparently there is a problem with the latest cPanel specially where the guestbook script is concerned. Download it from here and update manually.

I had the same problem and I found that add.class.php was misnamed to add.class.php.up so I renamed it and now my guestbook works. It's still the older version but it's a lot easier than reinstalling the whole thing. Hope this helps others.