Here you can configure settings for server system log.

Enable Server Log
To check this box will save server system log information to the file specified in the Log Filename. If this option is not checked, the server does not log any information to the file, regardless of the individual options checked in the "File" column.
Log Filename
The log file must be given a name before information can be saved to a file. Your system log file will be put in the Log\System directory. The log filename supports certain wildcard characters as outlined below.
%D - The current day of the month
%M - The name of the current month
%Y - The 4-digit value of the current year, (e.g., 2009)
Log Maxsize
The log file will no longer be written in when it reaches the limit you set here.