Rover 420 TD 96. Can you wipe memory of immobiliser?

the remote immobiliser can be disabled by using a code via the door key so many clicks left so many right etc.,
but you need the number from the security card or helpful ex rover dealers
on my car the code never worked as the switch on the door handle was worn thereby giving wrong number of clicks after replacing handle from breakers ever thing ok
robert@black-2000.freeserve.co.uk

robert black
August 2008