Error setting up Custom Security Extension

I am trying to set up a custom security extension. I've followed the setup
from the msdn article as well as the Microsoft Reporting Services in Action
sample. I keep getting an error when I try to start the ReportServer Service
after changing the config file. Can anyone help?
Thanks in Advance!
P.S. I looked in the log file and this looks like the first error:
ReportingServicesService!library!4!6/28/2005-16:21:10:: i INFO: Counter not
created. Category: RS Windows Service, Counter: Active Database Connections,
Instance: MSSQLSERVER. Error Message: Counter 'active database connections'
does not exist in category 'rs windows service'.Scott,
here I will suggest to restore original config files and reconfigure
them. Else please send me file, I will try to fig out the problem.
Mahesh