To verify, the code did not begin with FSDT as I've noticed other serial numbers in the past (FSDTORD....etc.). Was a string of 5-digit alphanumericals XXXXX-XXXXX-XXXXX.....
I'm sorry, I haven't realized you bought KDFW *NOW* for FS9, it wasn't very clear from your message, so I assumed you wanted to reinstall in FS9 something you bought years ago.
You got a different Serial because, after July 1st, we switched to another ecommerce provider and with a different activation system. The new activation system recognizes OLD Serials from Esellerate, and we updated the FSX and the P3D4 version of the software to support both system, since Esellerate will work until September 30th.
Since we never anticipate someone would still *buy* something to use it in FS9 today, and there wasn't enough time to update the FS9 software to support the new system, your new key cannot be activated right now, until we'll update the FS9 version of the software.
If you contact support by email, we can supply you with an Esellerate Serial Number which you can activate with the FS9 version of the software. That will work until September 30th, and even more, if you don't change your hardware. Hopefully, by that date, we would have released an updated of the FS9 version of our software.