Hi Abbas, Lets try to do this once more in a simple manner. I think the problem is in setting up the site. 1). Right click on your solution and publish it to a new folder, could be any location. 2). Now go to IIS and create a virtual directry and set the LocalPath to the new folder you created. 3). In IIS in the ASP.NET tab for ASP.NET version select 2.0 (If you are working in that version) 4). In IIS go to Documents tab and add your detault page and make it to top. 5). In IIS go to directry security and go to Edit and at the bottom there is a check box "Integrated Windows Authentication" make it checked true. 6). And OK it. Now browse the site and see.. Hope it helps, Thx, Gayani