SQuirreL Client Error

I'd like very much using a management tool with my brand new DB instance, so you can imagine my expectations reading this walkthrough:

http://code.google.com/intl/it-IT/apis/sql/docs/usingsquirrel.html

Unfortunately I'm stuck there: http://code.google.com/intl/it-IT/apis/sql/docs/usingsquirrel.html#connecting

My GMail is fabio.bozzo[at]gmail.com.... is the google cloud sql's username the same? Or only "fabio.bozzo" is?

My instance name is "fabiobozzo:testmysql" I suppose...

However i get this error while trying to connect with SQuirrel (the driver was added succesfully, indeed):

Google Cloud SQL: Access denied for user 'fabio.bozzo@gmail.com'@'localhost' (using password: YES)

I wonder what @localhost means... maybe the problem is there but... I just followed step by step the tutorial! :-(((

Can you help me?