MySQL didn't work well on my server so I had a look at the err file. It indicates that MySQL is getting started and stopped all the time. After it has started it will stop and then start again etc:

070106 14:40:25 InnoDB: Started; log sequence number 5 959534492
/usr/sbin/mysqld: ready for connections.
Version: '4.1.21-standard' socket: '/var/lib/mysql/mysql.sock' port: 3306 MySQL Communi$
A mysqld process already exists at Sat Jan 6 14:40:28 CST 2007
070106 14:40:38 [Note] /usr/sbin/mysqld: Normal shutdown
070106 14:40:38 [ERROR] /usr/sbin/mysqld: Sort aborted
070106 14:40:40 InnoDB: Starting shutdown...
070106 14:40:41 InnoDB: Shutdown completed; log sequence number 5 959534492
070106 14:40:41 [Note] /usr/sbin/mysqld: Shutdown complete
070106 14:40:42 mysqld ended
070106 14:40:42 mysqld started
070106 14:40:42 InnoDB: Started; log sequence number 5 959534492

Any ideas ?