Clio Boot Not Locking

Hi there. Today, this afternoon, ive driven home from work, parked the car onto the driveway, hit the central locking... all the doors lock but not the boot lock, the boot remains open! I thought, drive around for a bit and see if that would help charge the battery up.. still not locking, and not attempting to do so, just the other doors are locking....

what do i do??

(PS. I got a new battery 2 months ago so cant be low battery)