NPS, Rejected authentication requests not in the Eventlog

Hi there

I've configured a NPS Server as a RADIUS Server for 802.1X Wireless Connections.
In the General Settings of the Server under  "In additional to the errors that are automatically recorded in the Event Log, record the following events:" "Rejected authentication requests" and "Successful authentication requests" is selected.

However in the Eventlog only Successful authentication requests are logged. There are no Events about Rejected or failed authentication requests.
But in the Text Logfile in C:\Windows\system32\LogFiles are some reject and errors logged. So there are definitely rejected or failed authentication requests.
Why are these errors and rejects not visible in the Event Log ? In the Text Logfile there are very few information for debugging so it would really help if there are some Event Log entries about the failed authentication requests.

anyone got a suggestion?

The  Server is running Windows 2008 (NOT R2) and its also a DC.

Thx

J0Fe