HELP FOR SSH

[arvinboy <arvin burgos menusys net>]

hi there,
            i'm installing ssh from my server as an alternative to
telnet. i encounter some problems:
1. why is it that only 127.0.0.1/localhost is only allowed.  when i
issue this command "ssh myhostname or myinternal-ip or even my second
internal ip, it produce errors but in "ssh 127.0.0.1 or localhost is
okay? the system will prompt me some questions"Are you sure you want to
continue connecting (yes/no)?"
2. what are the things should i adjust inorder to solve this one. please
help!!!

thanks,
arvin