Can't register as 'purchased' Programming Ruby 1.9.2(third edition)

Hi pragmatic people, I’ve been adviced of a possible discount (or something related) on the new book Programming Ruby 2.0 for users that have currently purchased the third edition before. As I am one of those I’ll like to register the purchase of the book(third edition), I have it since one year but I’ve never registered as bought yet, but can’t now. The most approached option to chose is ‘Programming Ruby 1.9 & 2.0 (4th edition)’...there is no track for the third edition, it doesn’t exist on the list. Can you take a look at that? I’m interested on getting this last version in some way, thank you guys.

The offer only applies if you purchased the original book from us—registering a book bought elsewhere won’t work.

Okay, thanks Dave for the quickly response, btw I take the opportunity to say: Good work with Programming Ruby 1.9.2, great great work.