Unlock codes not recognised by Nanocom

[zzsteve]

Hi All,
Have obtained unlock codes for the Nanocom as I need to look at SLABS and BCU function on the V8. Entered them through the PC, progress bar indicated all was well, I can see them by scrolling through the Nanocom menu but when I try to look at SLABS or BCU faults the response is that the unlock codes need to be entered.
I haven't connected to the vehicle yet but can't see how that should make any difference.
Any hints?
TIA
Steve

[bellmore]

the codes are case sensitive.

[zzsteve]

OK, two steps forward, one step back...
Found one unlock code duplicated in the 6 licenses. Not sure if it was my error, but fixed it in remote mode, checked, and still no unlock codes recognised - aargh. By accident almost, I noticed that the incorrect code had not simply been overwritten - it appeared as the next licence code in the list. Corrected them down to number 6 and then I'm talking to the SLABS and BCU as I wished.
Cleared all of my SLS faults, went for a quick drive and tried to re-read them but now "unable to communicate with ECU" message! BCU seems OK.
I'm happy to have been able to program in a new key, but would like my SLABS back!
Is this the bad earth fault?

Cheers,
Steve
(Nanocom firmware 2.05)