Can't start mysql 5.0.15

[Arttur Andreev]

I have installed mysql 5.0.17 from ports on free bsd 6.0, try to start 
up using  the safe_mysqld --user=mysql

051227 22:22:18 [ERROR] Fatal error: Can't open and lock privilege 
tables: Table
 'mysql.host' doesn't exist
051227 22:22:18  mysqld ended

in than problem?  :(