Hi Vahid,

That's interesting. It should have asked for a password unless your machine has the password saved in the pgpass file.

http://www.postgresql.org/docs/9.3/static/libpq-pgpass.html

Can you locate your pgpass file and confirm whether you have your password stored there and if so, confirm that it matches what you had originally set it to and then retry the psql command?

Regards,

Jon