Hi, went out in the Xtrail today, parked up and locked with remote key as normal, came back out pressed remote unlock, opened door and Alarm started going off!!! Had to lock,unlock several times to eventually turn off alarm and all was fine after. This has happened once before about 2 weeks ago but been fine since, anyone any suggestions? I have recently bought a new lower remote key and programmed in using the normal method, but this works fine usually, could it be the remote transponder at fault? Help appreciated, Mark.