I cannot open/unlock the rear door on my 2008 SX4. It used to work fine up until a week ago. When I press the rubber covered button under the door handle to open I can hear a faint click but it acts like it's locked. All the other doors are unlocked. I can lock/unlock all the doors either by the key fob or the lock/unlock button on the drivers door, except for the rear door. I read through all the previous posts, and saw references to spraying WD40 from the inside - sprayed from inside and outside- no change. I checked the manual for a specific rear door fuse and did not see one mentioned. Is this a "only the dealer can fix" thing or is there something I missed- didn't try yet? I appreciate any feedback/advice. Thanks!