[TYPO3-windows] cc_awstats with IIS6 under windows - logfiles in wrong format

[Mohr, Andreas]

Hello List

I am trying to convince AW Stats Log File Analysis under Win2k3 IIS6 to run. I am running typo3 4.1.2 and have done the following after Installing AW Stats 0.10.0:

Created New Directory: D:\Inetpub\wwwroot\fileadmin\logs
Checked IIS MMC - typo3site - Properties - Website - Enable Logging
Set Log File Path - D:\Inetpub\wwwroot\fileadmin\logs 
Effective path is D:\Inetpub\wwwroot\fileadmin\logs\W3SVC1
Created folder "awstats-data" with empty text document "logs.txt"  

-> D:\Inetpub\wwwroot\fileadmin\logs\W3SVC1\awstats-data\logs.txt
Permission for IUSR und WPG_IIS is Modify

-> localconf.php
$TYPO3_CONF_VARS['FE']['logfile_dir'] = 'D:\\Inetpub\\wwwroot\\fileadmin\\logs\\W3SVC1/';
I also tried:
$TYPO3_CONF_VARS['FE']['logfile_dir'] = 'D:\\Inetpub\\wwwroot\\fileadmin\\logs\\W3SVC1\\awstats-data/';

Both times I got the same negative result:
AWStats Logfile Analyse
Error:
The logfile directory '' configured in typo3conf/localconf.php as '' was NOT found! 
--------------------------------------------------------------------------------
Die Logfiles müssen auf folgendes Muster passen: *.log oder *log*.txt
Beispiele: my-domain.log logfile.txt website-log.txt 

I do not exactly understand which is the expected naming convention.
Ma logfiles are named: ex071001.log

Has anyone got a clue? Can I configure AW Stats to retrieve th log files in the format tha I use? Thanks a lot in advance!
Andi