"Report Manager Virtual Directory" link greyed out in config. tool

I've just installed SQL Server 2005 Reporting Services on our development
servers and the "Report Manager Virtual Directory" link is disabled in the
configuration tool. Does anyone know why it is disabled, and how do I enable
it?
Also, the Web Service Identity link displays the following error message
when I click on it:
"There was an error while switching panels. The most likely cause is an
error retrieving WMI properties. The exception details are:
Object reference not set to an instance of an object."
I've verified that the "Windows Management Instrumentation" service is
running.
Background/current configuration:
- OS: Windows Server 2003 (Enterprise) SP1
- Web server separate from database server
- Reporting Svcs 2000 installed and working correctly
- Side-by-side installation of Reporting Svcs 2005 with 2000.
Any help would be greatly appreciated!
Thank you,
SanjayI am having the same issues on Server 2003 with SQL 2005.