You might have to wait for Tanya to give you some advice on how to sort out your problem. It does sound to me like your activation of the products has failed.

Try a different browser (Internet Explorer or Firefox) to see if that lets you get access to new links.

Make sure that if you are using Vista/Win7, that you use the "Run as administrator" option (Right Click on the installer and select "Run as administrator" from the list that pops up).

IF FSX is installed in its default location, C:\Program Files or C:\Program Files (x86), AND you are using Vista/Win7, then you might need to run FSX as an administrator too.