Fixed yet..?
I know you said it but just to make sure, you registered an ingame account by clicking the 'Register' option here..>
http://sa-mp.im/, right?
- Make sure you've activated your account by logging into your email address account and read the EMail from 'Italy Mafia :: RP Server' carefully and you'll know what to do.
- Make sure you typed your in-game name correctly when trying to log in on SA:MP
I'm pretty sure it's one of the above.