Ok guys I emerged MythTv(Gentoo) but when I try to run it I get this error:

Unable to connect to database!
Driver error was [1/-1]:
QMYSQL3: Unable to connect
Database error was:
Unknown database 'mythconverg'

couldn't open db
So I read up and I am suppose to do:

mysql < /usr/share/mythtv/database/mc.sql
But I get:

ERROR 1044 at line 1: Access denied for user: '@localhost' to database 'mythconverg'
Thanks for you help