Error During First Configuration After Installing Reporting Services (SQL Server 2005 Express)

Hi,

I have problem during first configuration of Reporting Services from MS SQL 2005 Server Express with Advanced Services SP2. The error occurs when configuring virtual directory (Reporting Services Configuration Manager -> Report Server Virtual Directory). When I try to create new virtual directory I can see following messages:

Number of errors: 0
Create Virtual Directory

The virtual directory was created and assigned.
Changing Secure Connection Level


After last message Windows reports that SQL Server 2005 Reporting Configuration Tool has encountered a problem and needs to close (and I can send report to Microsoft).

IIS shows that virtual directory under default web site was created.

Evenet viewer (application log) shows .NET Framework 2.0 error:
EventType clr20r3, P1 rsconfigtool.exe, P2 9.0.3042.0, P3 45cd6ee2, P4 rsconfigtool, P5 9.0.242.0, P6 45cd6ee2, P7 15a, P8 5, P9 system.nullreferenceexception, P10 NIL


My environment:
MS SQL Reporting Services Version 9.00.3042.00
Windows XP Proffessional SP2
IIS 5.1
all components are fresh new installations. The only additional configuration I've made was adding IWAM_<hostname> as WebServiceAccount, all other configuration is default.

Any help would be appreciated.

Best regards
Slawomir Nasiadka