ssh RSA key problem, Please help

[Nick <daye149@pacbell.net>]

I am getting the follwing message, how do I get rid of it??????
fresh install of ssh

nick@bluebox:~$ ssh 63.XXX.XXX.2
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that the RSA host key has just been changed.
Please contact your system administrator.
Add correct host key in /home/nick/.ssh/known_hosts to get rid of this 
message.
RSA host key for 63.XXX.XXX.2 has changed and you have requested strict 
checking.
nick@bluebox:~$