Trying to connect active: need to be using port 20

Help, please:
I am trying to connect, using active mode to a site.
The site admin sent me the following:
"The problem is the PORT command. He is instructing the FTP server to send data back on a port other than port 20. Have him remove the PORT line from his script and try it again"

Here is the log that I sent him:

Using Port 21:
Resolving host name "x.x.x.x"
Connecting to x.x.x.x Port: 21
Connected to x.x.x.x
220- WARNING! Authorized Personel Only!
220
USER yyyyy
331 Password required for yyyyy.
PASS (hidden)
230 FTP access granted for yyyyy
SYST
215 UNIX Type: L8
TYPE I
200 Type set to I
REST 0
350 Restarting at 0. Send STORE or RETRIEVE to initiate transfer
PWD
257 "/" is current directory.
PORT 172,19,11,5,7,78
200 PORT command successful
LIST -aL
Timeout (20s).
Active Help: https://www.smartftp.com/support/kb/45
Client closed the connection.
Automatic failover of data connection mode from "Active Mode (PORT)" to "Passive Mode (PASV)".

What am I missing / how can I specify/control the PORT command?

Any assistance you can provide would be a great help.
Thank you,
Rick

"He is instructing the FTP server to send data back on a port other than port 20" is a misleading statement. In active mode, data is send from the server's port 20 to an unprivileged port > 1024 on the client. That is the port the PORT command specifies, and there is no need for it to be port 20. Try explicitly using passive mode to connect to the server. If that falls, limit the local port range in SmartFTP (in the connection settings) and forward these ports to your PC in your router / firewall configuration.