Hi guys,
Thank you for your help, very much appreciated.

I am trying to access AD but with no luck... 

I am getting the following error:
Accessing Global Catalog:
FAIL
Checking Root Domain:
OK
Accessing LDAP:
FAIL
Find all domains in network:
Could not access LDAP to obtain domains info
Logon failure: unknown user name or bad password

In know that the credentials are correct since the followgin code does run:

            DirectoryEntry entry = new DirectoryEntry("LDAP://" + my_domain, user_name,password);
            DirectorySearcher mySearcher = new DirectorySearcher(entry);

               mySearcher.Filter = "(&(objectclass=user)(SamAccountName=georgeBush))";
                results = mySearcher.FindAll();

The detailes I'm using in the DNN authentication page are:

 
 Provider ADSIAuthenticationProvider

  Authentication Type Delegation

  Root Domain: my domain

  User Name: my domain\user name

  Password: XXX

  Confirm Password: XXX

  Email Domain: empty(I also tried with value)

  Auto-login IP Address (Optional): 
FAIL
Find all domains in network:
Could not access LDAP to obtain domains info
Logon failure: unknown user name or bad password.

Thanks a lot Mike for the quick support. It's wonderfull.
I got the AD authentication set up correctly (

Accessing Global Catalog:
OK
Checking Root Domain:
OK
Accessing LDAP:
OK
Find all domains in network:
1 Domain(s):

However:

1. I am still getting the login and register links on the right hand side of the home page.
2. It doesn't seem to be doing any authentication against AD (If I try to put in my domain account credentials - DNN does not recognize it. If I just use the credentials I added when I set up DNN - it works).

What is wrong?

I set up DNN on my local machine,which is part of a domain.
The settings are:


 DotNetNuke Authentication Settings
--------------------------------------------------------------------------------
 Enabled  unchecked(I also tried to use it checked)
 Captcha unchecked

  Active Directory Settings
--------------------------------------------------------------------------------

 Accessing Global Catalog:
OK
Checking Root Domain:
OK
Accessing LDAP:
OK
Find all domains in network:
1 Domain(s):
my_domain_name
 

--------------------------------------------------------------------------------
 
 Enabled checked
 Hide Login Controls  checked
 Synchronize Role checked
  Provider    ADSIAuthenticationProvider
 Authentication Type Delegation
 Root Domain: my domain name
 User Name:  my domain user name
 Password:  my domain password
 Confirm Password: my domain password
 Email Domain: @my domain

 Auto-login IP Address (Optional): empty

Thank you Mike.
Roy