The problem is with your web server. First ensure that IIs is properly installed or not. Also if you have installed IIS after installing .NET, then run the following command on the Visual Studio .NET command prompt aspnet_regiis -i (this is needed only in the case when IIS is installled after installing the .NET) If all this has already been done-- try this... Try to restart IIS and then execute the project. This generally works. If still it doesn't, yet another option is to Run without debugging(use Ctrl+F5). This will surely work. Hope this helps -Divya Singh