Thats probably because you need to donate minimum of $20 to get the manager and 3.0 access. If you already have purchased 2.1 you may still be eligable for the 3.0 but the automated list system won't add you.
Got to
http://xmoonproductions.com/account/download.phpto download the manager
and if you have issues loggin in contact XPAdmin here stating your issues and he will explain and fix it for you
http://www.xmoonproductions.com/support/