Hi,

Im using DNN 4.8 and i have problem login with host user after i switched from sql authentication to windows authentication.

i get this message:

A critical error has occurred.

Object reference not set to an instance of an object.

The only thing i configured was changing the web.config in several places

1. connection string:

<connectionStrings>
    <!-- Connection String for SQL Server 2000/2005 -->
    <add name="SiteSqlServer" connectionString="Data Source=localhost;Initial Catalog=DotNetNuke; Integrated Security=SSPI;" providerName="System.Data.SqlClient" />
  </connectionStrings>

2. I enabled win aut mode in  web.config and disabled forms aut:

    <authentication mode="Windows"/>
    <identity impersonate="true" userName="SERVER\Administrator" password="**************"/>

after i did first 2 things i was able to access web page and data base  using win authentication , but then i get the "critical error ....." message mentioned above , when i try to login like host user.

3. And after i get the "critical error...." message i added module in <httpmodules> tag:

<add name="WindowsAuthentication" type="System.Web.Security.WindowsAuthenticationModule" />

but nothing changed.

Can someone help me with this problem?

Thank you.

i want web server to access on the locall web server  database using win aut

previously  was set to use database on the sql server , but now i transfer database on the local web server and i whant to set up  so that

web page can access the database locally using win aut.

web server is using win 2003 r2 , do i need to configure something else in windows , or ....?