Please google for passwordless SSH authentication (Which many list members most likely will disapprove)
Request you to try something and post queries when it fails completely with error message etc.
http://www.firedaemon.com/blog/passwordless-root-ssh-public-key-authenticati...
http://www.itzgeek.com/how-tos/linux/centos-how-tos/password-less-login-ssh-...
You have been posting queries in this in other lists often without doing your homework.
and post a thanks if any solution works out for you as all the members here are voluntary contributors whi are sharing their valuable time and experience.
Thank you very much for your help. It solved my problem.