make sure you have winrar to extract 360 revolution and also the latest net.framework(4.0 or 4.5). then download 360 revolution again. if that dont work then go to this link: http://www.xpgamesaves.com/topic/44891-common-360revolution-problems/page__pid__186176#entry186176
360Revolution requires necessary components to run (.NET Framework 3.0 - 4.0) Will be available for free for download on MS's website. Otherwise, make sure your credentials you are logging into are that of the same of your XPG credentials. Special Characters in your password will not allow you to log in