Galactose

Hi all, I have a 2006 Subaru B9 Tribeca. It works pretty well for its age, but the most annoying part about the car is the fact that the keyless entry fob will only unlock the passenger and rear doors, and I must use the key to unlock the driver's side door. I've pored over the owners manual and haven't found anything-would anyone be able to point me in the right direction? Thanks