Unable to locate serial number Acrobat 9 Standard, to transfer to a new computer

I have Adobe Acrobat 9 Standard (desktop) on an old computer, and want to move it to a new computer.  However, I  no longer have the original CD/packaging.  I cannot get the serial number from the software itself, and although I have filled out the Registration form, it is not showing up in my account.

Please help - how can I transfer this software to my new computer?