Cannot open database "Your_DB" requested by the login. The login failed. Login failed for user 'NT AUTHORITYNETWORK SERVICE'. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Data.SqlClient.SqlException: Cannot open database "Your_DB" requested by the login. The login failed. Login failed for user 'NT AUTHORITYNETWORK SERVICE'.