Failed attempts not being logged on 2008 R2

I have NPS running for .1x authentication for our wireless.  It is working properly but there is no record of any failed attempts of any kind anywhere that I can find.  I've done this so far (multiple times):

auditpol /set /subcategory:"Network Policy Server" /success:disable /failure:disable

auditpol /set /subcategory:"Network Policy Server" /success:enable /failure:enable

And this:

auditpol /get /subcategory:"Network Policy Server"

with this result:  Network Policy Server                Success and Failure

I cannot find any record of failures in event viewer nor in my log file.  This same thing happened with a different server running 2008 (not R2) months ago.  We gave up on the original server in hopes R2 would solve the issues.

Any ideas?