when using Nanocom 1 it is advised that after each diagnostic session that the alarm is armed and then disarmed
before checking that changes have been made. May be worth a try with your kit?
sure it's oil and not deisel? common leak from that area is from the FPR, assuming you mean 'drivers' side. worth a read of this walkthru' if it is
http://www.discovery2.co.uk/Fpr.html