EntityKey null reference

When I run this code:

var newAnagrafica = e.Entity as Anagrafica;
var idParrocchia = Convert.ToInt32(Request.QueryString["idParrocchia"]);
EntityKey en = new EntityKey("ParrocchiaGestDbEntities.Parrocchia", "idParrocchia", idParrocchia);
newAnagrafica.ParrocchiaResidenzaReference.EntityKey = en;

I get this error on the last line:
Object reference not set to an instance of an object.

Locally everything works fine..
Can please somebody help me?

 

Does your application connect to a SQL server in the back end?

Did you upload the database and all the required objects and data to our SQL server?

 

Yes I use Sql server and I've uploaded all I need
By the way I found the solution!
The error comes out when I try to insert a new record setting a date field with a not valid value (ex. 24/12/1985)
Thanks

 

Thanks for posting the follow up.