I just tried to deploy my asp.net website and ran into a problem. Here is the error message: "A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)" It seems as if asp .net cannot find the .mdf sql database in the App_Data folder. The website and the database were created with the Visual studio 2008. Do I have to change the path in the dataset or something?