If you are referring to the Developer's Subscription, you do not get a copy of FileMaker 12 Advanced. What is included with the subscription is a development license for FileMaker Server Advanced that allows 3 web connecitons and 3 conenctions from FM clients.
If you purchased an updgrade to FM12 Advanced then i would contact FileMaker, the download would not be linked to your technet account.
As a related question (asking without adding the noise of a new thread), is there a copy of the EULA for the server development license available before joining/downloading?
There is a brief overview of the development license and what it is enabled for available on their website here: http://www.filemaker.com/technet/dev_license.html.
You may be better off contacting FileMaker directly for an EULA.