FTP连接不了 要命

public static void main(String[] args){
FtpClient ftpClient=new FtpClient();
try {
ftpClient.openServer("192.168.0.66");
ftpClient.login("root","careers");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}自己写的FTP连接java.net.ConnectException: Connection refused: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(Unknown Source)
at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.net.NetworkClient.openServer(Unknown Source)
at sun.net.ftp.FtpClient.openServer(Unknown Source)
at sun.net.ftp.FtpClient.openServer(Unknown Source)
是不是哪里没有设置好啊？ 什么端口没有开
请大家看看 谢谢大拿们!