Trying to change default sort field and order
 

Hi, i'm trying to run two pieces of code but get the following error. Any ideas what is causing this?

Code:
UPDATE forum
SET defaultsortorder = 'desc'

Code:
UPDATE forum
SET defaultsortfield = 'lastpost'

Quote:
Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, webmaster@****.com and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

Using v3.84 and where would the server error log reside? As i can't see it in the ACP.

Thanks for looking.