connect til database

Jeg forsøger at connect til en firebird databse (interbase)

men jeg får følgende fejl..

Object reference not set to an instance of an object.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:


Line 64:           FbCommand    myCommand      = new FbCommand("select * from helpdesk",conn);
Line 65:
>>Line 66:             IDataReader myReader = myCommand.ExecuteReader();
Line 67:    
Line 68:             try

nogle ideer ?