Based on your error messages it looks like you're using kerberos for authentication and that it hasn't been set up correctly. You might want to (1) read the man entry carefully for your ftp server and (2) do a google for kerberos authentication howto
Since I am a nice person
I did (2) for you and found this:http://tldp.org/HOWTO/Kerberos-Infrastructure-HOWTO/
(3) You might also want to lose the last sentence of your original post. It doesn't get you help any faster and will annoy some people.