IIS Web logging is NOT workiing

Web logging is NOT working my setting are

Logging > Use this feature to configure how US logs requests on the Web server.
One log file per > Site
Format > W3c
Directory > %SytemDrive%\inetpub\logs\LogFiles
Log Event Destination >  Log file only
Log File Rollover > Schedule > Daily
Action > Disable (Mains Enable)

Directory > C:\inetpub\logs\LogFiles\W3SVC and W3SVC1, stay empty

Somebody can help me out?

Thx Rob73

btw FTP Logging is working fine