IIS permissions

Hi guys
I am looking for an advice for Security betwen DC W2K3 and IIS installed in
the same server.
I installed a software antivirus that generate a Virtual web site.
But, when I try to open the web site even in the server and even using the
administrator account it appear a message as follow:
Will some body able to give me an advice or a solution..?
Thanks in advanced
Ricardo Lopez
rlopez@xxxxxxxxx
t. 522222232723

============= MESSAGE ===============
You are not authorized to view this page
You do not have permission to view this directory or page using the
credentials that you supplied.
--------------------------------------------------------------------------------

Please try the following:

Contact the Web site administrator if you believe you should be able to view
this directory or page.
Click the Refresh button to try again with different credentials.
HTTP Error 403 - Forbidden: Access is denied.
Internet Information Services (IIS)

--------------------------------------------------------------------------------

Technical Information (for support personnel)

Go to Microsoft Product Support Services and perform a title search for the
words HTTP and 403.
Open IIS Help, which is accessible in IIS Manager (inetmgr), and search for
topics titled About Security, Authentication, and About Custom Error
Messages.
===============



.