Central locking, Alarm, Immobiliser failure on Discover 2 td5

Its great to have a secure vehicle but when it locks its owner out that sucks.
Is there a cure to Central locking that wont unlock, Alarm that wont deactivate and immobiliser that, well, wont re-mobilse. Is there an easy fix or is this one of those problems that makes you think " i should have bought a Nissan Patrol."
Can anyone suggest possible problems, solutions. ( its not the key fob)

Just been to get EKA code from the nice men at LR.

Hope this flippin works as the alarm horn is giving my neighbours heart attacks every time it goes off. Im not very popular at the moment

should have bought a Nissan Patrol

Now here's a thing. I put the EKA code in (eventually) and hey presto it worked. Now according the people that know, i should have to do the EKA code entering every time I lock/unlock. but thats not the case.
Locking the drivers door activates the Alarm/immobiliser but Unlocking the drivers door deactivates it. No EKA code needed. Nice !!!