Trouble changing General Settings

Anytime I try to change the General Settings, I get a "Query Error"
Even if I make no changes, but click the "submit settings" button, I get this error. I don;t know how to fix this Any help will be appreciated.

MySQL Error : Query Error
Error Number: 1054 Unknown column 'thumbnail' in 'field list'
Date : Tue, October 28, 2008 15:02:29
IP : 72.11.66.62
Browser : Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; InfoPath.2)
Referer : http://www.567thadm.org/forum/admin.php?action=settings&panel=general&session=xxxxxc86d5&uid=1
PHP Version : 4.4.7
OS : Linux
Server : Apache
Server Name : www.567thadm.org

Sounds like one of your tables is missing a column.

Have you recently updated the files and or database structure?

Not sure about that but you certainly need to set the base url found in the config.inc.php file.

Carbonize wrote:Not sure about that but you certainly need to set the base url found in the config.inc.php file.

Set it to what??

http://www.567thadm.org/forum

Carbonize wrote:Not sure about that but you certainly need to set the base url found in the config.inc.php file.

OK, did that. Found that file in two locations. Root directory and in the admin folder. Changed both. Still get the error.

Auron wrote:Sounds like one of your tables is missing a column.

Have you recently updated the files and or database structure?

Not recently, but then again, I have been getting this error for quite a while. Before I upgraded to 2.4.3. I am not really sure when it started. It doesn't effect daily normal use of the guestbook, but I can't make any changes on the admin level. I think it stated when I was getting bombed with spammers, and I tried to prohibit certain IP address. That's when I first got this error, but that was over a year ago. I had posted here then, but never got a reply to my post.

Try replacing all your existing files EXCEPT the config.inc.php file with new ones.