Hello,
This is usually because one or more of the required fields in your user profile is not complete. To rectify this please click on the following link to
login and view your profile. Alternatively if you are already logged in, scroll to the right-hand-side of the page and click on your
username next to the Logout link under the red bar. On the profile page click on the Edit Profile button and check that all the fields shown with a red star are filled in. Once all the required fields are complete you should be able to download the software.
Gregory