ERROR 1146 (42S02): Table 'mysql.servers' doesn't exist

mysql> grant select on *.* to 'na'@'%' identified by 'na';
Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;
ERROR 1146 (42S02): Table 'mysql.servers' doesn't exist
mysql> select user,host from mysql.user;
+--------+-----------------+
| user   | host            |
+--------+-----------------+
| na     | %                   | 
| root   | 127.0.0.1       |
| root   | localhost       |
+--------+-----------------+
5 rows in set (0.00 sec)

mysql> source /data/soft/mysql/share/mysql/mysql_fix_privilege_tables.sql;
Query OK, 0 rows affected (0.00 sec)

mysql> grant select  on *.* to 'nss'@'%' identified by 'na';

Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

mysql> drop user nss@'%';

Query OK, 0 rows affected (0.00 sec)

mysql>