Timed Out Starting Mysqld Daemon when setting up replication

I am now doing the MySQL Master Slave Replication between two of my fedora core 8 servers, on master every time开发者_StackOverflow社区 I uncomment log-bin=/var/lib/mysql/mysql-bin and then try to restart the server, it shows the following error:

Cannot Start Mysqld Service..Timed Out Starting Mysqld Daemon

Does the user mysql runs as (usually "mysql") have read-write access to the binary log?