Question : ftp timed out

I am using ftps ( MoveIt Freely ) software to connect to a ftp server and upload a data file. I am able to connect and then when I issue any command, I am getting
200 Port request OK and then I am getting a Time out after some time.

Here is the snapshot -

D:\>ftps xxxxxxx.xxxx.xxx
220-FTPD1 IBM FTP CS V1R9 at xxxxxxx.xxxx.xxx, 10:29:46 on 2009-07-31.
220 Connection will close if idle for more than 10 minutes.
Connected to xxxxxxx.xxxx.xxx.
User: abcdef
331 Send password please.
Password: ********
230 abcdef is logged on.  Working directory is "abcdef6.".
ftp> ascii
200 Representation type is Ascii NonPrint
ftp> ls
200 Port request OK.
Timed out waiting for connection from server.
ftp>

Any ideas as to what I am missing.

Thanks

Answer : ftp timed out

error 550 usually refers to a file permission failure