Disco 2 cranks No start

I have a 2002 Discovery 2 V8 4.0 Motoronic Petrol. Sat for a yr. And bought battery, 2 ECM's still have original. Bought Nanocom, and SyncMate. I think I need to have the security codes the same in BECM and ECM. I know the EKA code but don't know how to see if they are the same or how to change them if they are not. I'm new to Landrovers really need help. Thank you so much.

If it cranks but won't start. I don't think the keys etc are your problem.
On my TD5, admitted a bit different, if I haven't de-immobilised it, it won't even crank.

Go with nanocom in Utility and run both actions

BOSCH MOTRONIC M5.2.1 - Diagnostic Capabilities (UTILITY)
· Discovery Security Learn: This function forces theMotronic ECU to learn the incoming
code from the BCU in a Discovery Series II as its correct mobilization code.

· Reset adaptive values: The adaptive values should be reset if any of the following
components have been renewed or rectified: fuel injector, lambda sensor, fuel pump,
fuel rail,MAFS, inlet manifold, after fixing an air leak or if a new ECU was fitted.