We have an ASP.NET application that was written by a former employee that I have thus far been holding together with duct tape. The app was written with MVC, NHibernate and
Could you check permissions for IIS user in your wwwroot folder and “Temporary ASP.NET Files” C:\WINDOWS\Microsoft.NET\Framework\version\Temporary ASP.NET? If permissions alright try clear asp.net temp folder and run your application again(and check permissions on this folder again).