The username to log in can be anything, it is an account name which can be different to alias/profile although doesn't have to be.
And no nothing to do with email adresse. For what it is worth i found your profile and has the name 'iN5OMANiAC'. So try that but as i said that might not be the account name.
Edited by Sharzam at 15:58:32 18-11-2012
Known as 'Sharzam' in 98.5% of games