FTP进不去了

benzcomp

[R] Connecting to digi -> IP=211.91.255.166 PORT=21
[R] Connected to digi
[R] 220-BBSFTP Pro- [http://redcheek.net/bbsftp]
[R] 220 Serv-U FTP Server v5.0 for WinSock ready..
[R] USER benzcomp
[R] 331 User name okay, need password.
[R] PASS (hidden)
[R] 421 Your Account Is Expired!
[R] Connection failed
[R] Delaying for 60 seconds before reconnect attempt #1
登录FTP出现这个提示！
什么意思？"Your Account Is Expired!"