可爱的双胞胎宝宝图片:FTP高手!!!上传的问题

上传连接不上,提示为:
*** CuteFTP Pro 6.0 - build Mar 25 2004 ***

STATUS:> Getting listing ""...
STATUS:> Connecting to FTP server 210.52.233.98:21 (ip = 210.52.233.98)...
ERROR:> The remote host actively refused the attempt to connect to it.
1) Verify that the destination server name or IP address is correct
2) Verify that the connection port number is correct (under Site Settings | Type tab).
3) The remote server may be temporarily or permanently inaccessible (try again later).
4) Verify that you have chosen the right protocol (SSH2, SSL, FTP, etc.) and have setup all required options for that protocol.
5) Verify that the destination IP address and port numbers are correct.
6) The remote server may be refusing multiple connections from the same client. Try using only one connection thread when connecting to this particular server (Site Settings | Options).
7) Try pinging the address.
8) If you are using a router, verify the router is up and running (check by pinging it and then ping an address outside of the router).
9) Do a traceroute to the destination to verify all routers along the connection path are operational.
10) Verify that your subnet mask is setup properly.
11) Verify that your local software or hardware firewall is not blocking outbound connections originating from CuteFTP.
12) Verify that your anti-virus software is not at fault (try disabling it).
这表示什么意思?????