A customer (XTS 3.00) upgraded their receptionist's phone from a 24-button Triad phone to a 30-button Large LCD phone. They are telling my the Discovery software the receptionist uses as a BLF no longer works. Any ideas?

All I did was change the phone type (flash 50, page B, button 1), reassigned the buttons for the new desi layout and swapped out the phones reusing the same line cord. I didn't even touch the tapi adapter.

Did I need to adjust anything else?