well i have two account.. one for myself and one for a friend.. i can get into my account but not my friend, also i can get in with my laptop but not my home pc with my own account.. so i would assume that they go by ip address...
nevermind... i got it to work... its a problem with the linking. i guess they're changing the names of how ppl type the link to get in... i couldn't get on the site using www.doozija.com but it works with just http://doozija.com