HELP: Flashing key light on 2008 Nissan Micra

[456GT]

I've had a look on other forums but hopefully someone here know the answer...

The light is flashing and when you unlock the car, all the doors unlock instead of just the driver's door (anti-hijack feature). Everything else seems to be fine and the car starts ok.

I think the anti-hijack needs to be reset but unfortunately we didn't get the manual with the car. Does anybody know how to reset the system?

Thanks in advance!