请教vsftp权限问题！

jackfya

原来在red hat 9.0 下我做的虑拟用户认证ftp可以正常登陆。
今天又给一台fedora core 4 装上vsftpd可是却出一这个错误。
请教大家该如何解决

ftp 127.0.0.1
Connected to 127.0.0.1.
220 Welcome to fly lindia FTP service.
530 Please login with USER and PASS.
530 Please login with USER and PASS.
KERBEROS_V4 rejected as an authentication type
Name (127.0.0.1:root): admin
331 Please specify the password.
Password:
500 OOPS: priv_sock_get_result
Login failed.
421 Service not available, remote server has closed connection

谢谢了