We retrieve data from a company called XYZ through httpwebrequest.
The program is coded using VB.NET
They have given a certificate to install.
This certificate is included with the request object.I use httpwebrequest to
retrieve data. The certificate is added to the client certificates
collection.

When this component is called from a windows application, I can retrieve the
data.
When this component is called from a web page, I get the following error
The remote server returned an error 403 forbidden.
we have no special setting in machine.config for the section processmodel.
The aspnet process is running under the username aspnet.
if  I deploy my component in COM+, it runs successfully.
we feel it is because of permission issue for the user ASPNET .
I have used winhttpcertcfg tool from microsoft to give access to the private
key for the user ASPNET.
The certificate is installed under local machine account in the folder
Personals(LOCAL_MACHINE\MY).
I have no success even after utilizing winhttpcertcfg . I feel that the
httpwebrequest is somehow not passing the client certificate.
to the server. I donot want to  put this component in COM+ or make any
changes to Processmodel section of machine.config files.
I have given permission to the key under C:\Document and
Settings\Allusers\applicationd­ata\microsoft\Crypto\RSA\Machi­neKeys for the
user ASPNET.
I have had  no success even after doing all these steps.
I have tried using LogOnuser API to change the security context but still I
had problems.
In .net framework V1.1, to successfully run LogOnuser API, we have to make
the user ASPNET to act as part of the operating system. This results to
giving high privilege account to the user ASPNET which is against our
security policy.
Environment: windows 2000
.Net framework Version 1.1
IIS 5.0
Programming Language used is VB.NET

give me some insights into the issue