Limit SQL Reporting Trace log

Hi!

We are using SQL Reporting services for SCCM 2012, and SQL Reporting trace logs (ReportServerService__timestamp.log) are filling very quickly.

I configured it not to log as described here http://technet.microsoft.com/en-us/library/ms156500.aspx and changed log retention period, then restarted SQL Reporting Server service, but the ne settings don't take effect?

What should I do so that new settings take effect?

Thanks,

Peteris