I am trying to book Delta pass travel utilizing by father's PPN and hire date, which I have done successfully in the past. Now, I can only get through the MyDelta travel line to the point where I enter his PPN. But when it asks for hire date, I get rejected. My dad started with Western Airlines on 02/01/43 (that's not a typo!), then became a Delta employee when Western was acquired. I know the data is correct. Can someone help me? Thank you!