ftp problem

java ftp server: (www.myvgiserver.com)

ftp client get this:

ftp proxy 421
KERBEROS_V4 auth type
name user@ip
passive off
ls
200 command port okay
150 File status okay about to open data connection
550 Requested action not taken
----
still waiting until disconnect...

if i use the ftp client in lan the connection works
fine and ls put data.

Its not a port problem, i think it is a ftp server config problem.
i tried this with www.eftp.org ftp server and it works perfectly.

but i need the java ftp server (because of the mysql usage)

please help me !!

thx tom