Weird ATC

Hi to all,during my last flight over Italy from Florence to Naples, Rome center said to me to contact Pisa approach.Pisa is very far to the north and doesn't have nothing to do with Rome going south to Naples.Obviously there is an error in the ATC files.I checked by Lee Swordy AFCAD all frequencies in the stock&Mod files of the near airports possibly related with the position where I had this strange instruction.All airport frequencies are correct.There are somewhere else in FS9 other files used by the ATC to drive traffic on airways?If they do exist how can I correct this error?Thank you