ftp problem LAN behind NAT/fierwall to LAN

hi I have a problem with ftp connecion
there is a ftp server on port 2121(forward on LAN)
and me also on LAN but another one.
I asked my adminnistrator to free this port so i could conect to this
ftp , and so he did, i can connect to it but when mz ftp client trah to
list files i get
350 Restarting at 100. Send STORE or RETRIEVE.
REST 0
350 Restarting at 0. Send STORE or RETRIEVE.
PWD
257 "/" is current directory.
TYPE A
200 Type set to A.
PASV
227 Entering Passive Mode (xxx,x,xx,xx,13,230)
Data Socket Error: Network is unreachable
List Error