Is that all it says?
Does it not give any exact reason as to why it can not be transferred?
Have you linked the accounts?

Other than that, I can't think of anything else right now, except for suggesting contacting the Customer Service since they do not provide support for Account/Billing related issues here, at all. =/


And I do agree, it seems to be sort of an art to make it not-simple, even though they claim one of the reason for this change is to make it all more user-friendly and secure...


Good luck!