where is my Adobe ID? page missing at http://www.adobe.com/it/products/digital-editions/ebookcreateid.html

here's the thing:

1. I purchased a book on a shop online
2. I received a file URLL.acsm
3. I go to http://goo.gl/JhWHjo  and click on "register"
4. the link goes to the installer page
5. I install Adobe Digital Edition on my pc
6. I launch the software
7. I drag and drop the file .acsm on the software
8. the software ask for "adobe ID" (see first image)
9. I click and reach the page http://www.adobe.com/it/products/digital-editions/ebookcreateid.html (see second image)
10. and the message is PAGE NOT FOUND

are you kidding me? Where's the "adobe ID" I need for obtain the book I already paid and still haven't??

I'm seriously angry :-((((((