Drive keys

fredpires Aveiro
Hi All, 
Where can I get the drive key of a irb140 arm? 
Bought it to couple with an irc5 panel but came without its drive key, I only know the serial no as I don't have access to its previous controller where I could potentially extract a backup and take it from there!
Tried using a drive key from another irb140 but no good, came up saying not supported by current system (not '09)

Thanks in advance
Fred Pires