well I am using simple winforms which stores image into databasehere is fragment of this code private void btn_Save_Click(object sender, EventArgs e) { byte[] imagedata = ReadFile(txtImageLoc.Text); SqlConnection connection = new SqlConnection("Data Source=WEST/SQLEXPRESS; Initial Catalog=Images; Integrated Security=true;"); string query = "insert into ImagesStore (ImageData)values(@ImageData)"; SqlCommand command = new SqlCommand(query, connection); command.Parameters.Add(new SqlParameter("@ImageData", (object)imagedata)); connection.Open(); here throws this exception * command.ExecuteNonQuery(); connection.Close(); this.Close(); }* - 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: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)I have not idea what is problem, help :(