Error in mysql5?

[Carlos Silva, yourdot-internet.com]

Hi,

I've just maked a fresh port install from mysql5-server and run 
mysql_install_db and next:

osiris# /usr/local/bin/mysqladmin -u root password nx3v2g1
/usr/local/bin/mysqladmin: connect to server at 'localhost' failed
error: 'Access denied for user 'root'@'localhost' (using password: NO)'

but, i have this error, why?!

someone know how to solve this?

-- 
Best Regards,

Carlos Silva, YourDOT
Web: http://www.yourdot-services.com/