[Resolved] New aircrafts bought without registration code

[Long Airways]

with recent aircrafts i bought there isnt a registration code. instead, there is a link saying 'register aircraft' but when clicked, nothing happens.
aircrafts before this have the normal hong kong registration code 'B-xxx'

Airline: Long Airways
World: PW 1769
Year: 2001

what is the problem?  

[StephenM]

Quite and old one but this issue was caused by running out of letters for the registration. I have extended the list for Hong Kong as its likely to happen again to up to 3 letters after the main registration of B-H.