What to enter for Log Prefix for UT99?

[zunnie]

Hello, i am currently trying to get the stats to work on my site, the php and mysql etc is working fine but i'm not sure what to enter for the Log Prefix.
The Logs folder of my UT server has some Unreal*.log files but when i try to parse the logs from admin page it says there is nothing to process.

I've also got the UT3 statsdb working properly and processing hourly stats, do i need a mutator for logging for UT99 server as well?

Thanks for your help!

edit:
UTStatsDB version = latest 3.06
Operating system and version = Windows 7 Ultimate x64
Database type and version = mysqlnd 5.0.11-dev - 20120503
PHP version = 5.6.31
Web server and version = Apache/2.4.26 (Win32) OpenSSL/1.0.2l PHP/5.6.31
Unreal Tournament version = 436
Stat logger type and version = hmm? default that comes with the server 436

[Panther]

You don't need a mutator for UT '99 logging. Mainly, just make sure the following settings are configured in your Logs Config settings:

Log Path: <server path>/Logs/
Log Prefix: Unreal.ngLog.
No Port: False
All Logs: True
Multi-check: True