You get the error because the PORT command is following a PASV command. They should not happen together.

You chopped off the top of the dubug output, what version of Net::FTP do you have installed ?

As someone else noticed you have a private IP, is the server on the other side of a firewall ?

If yes, you must use passive mode, as the remote server will not be able to connect back to you. But that is a different problem.