[CentOS] Cannot start SSH at boot

On a particular CentOS 6 install, I must start SSH manually:
# /etc/init.d/sshd start

I have tried to configure it to start automatically:
# chkconfig --level 3 sshd on

However, it still must be manually started. I am not getting any
errors. What might be preventing it from starting?

Thanks.

-- 
Dotan Cohen

http://gibberish.co.il
http://what-is-what.com