Using debugdiag for iis hang

I am trying to use the debugdiag tool for resolving a problem with an iis
hang. My problem is that after I start the debugsvc, it gets a 403 errors in
the logs attempting to access my page. The web is set up for anonymous
access. I have tried changing the logon and password for the service to my
own administrative login and I continue to get the same error. Does anyone
know how to fix this problem? My apologies if this isn't the right forum for
this question. Thanks in advance for your help.

- Linda