liftgate

[cavx5]

hello everyone..just a question..i have a2005 x5 4.4 sport/prem package..when the vehicle is locked the liftgate does not open manually..normal...when i unlock just the drivers door with key fob and i want to open lift gate manually it does not release..when i unlock all 4 doors by pressing key fob a second time then the manual release functions and i can open the hatch..i think things have changed since i got the car..i think it worked manually when i just unlocked the drivers side door...am i losing it or just had a senior moment..can anyone advise me if it is functioning normally or not qm...thanks rob