did everything still says failed to login : bad login
Do you have any mods installed? or at least, is it a vanilla client and up to date?
Do you have the latest java? No idea if that will help, but can't hurt.
Are you trying to use hamachi? Because it's not needed.
Also, whats the name that you use to log into MC? I think that's the one Bla uses for the whitelist, so if it's different than what you said such as capitalization.....