Hi yang,
The database entries for the 3 hex codes details are as follows-
A03F48,N115FE,42713/1078,Boeing 767-3S2F,FedEx Express
A01412,N104FE,42708/1064,Boeing 767-3S2F,FedEx Express
A046B6,N117FE,44379/1079,Boeing 767-3S2F,FedEx Express
Are you using software version 5.00.72 and do you have an up to date database on each unit. The reason I ask is that in each case previously each registration was used by a Boeing 727 but these were sold and re-registered many years ago. In each case the registrations have been re-allocated and are now on the Boeing 767's so I would suspect your database needs updated.
Alan