I don't know if it's true that the dos version of FTP doesn't do passive transfer, but it could be. I would try using another FTP client that you know does passive transfers. I assume you're using a windows machine (dos reference) so you could try using IE as an ftp client. Just type
ftp://userassword@ip_address in the address bar. I think the latest version of IE allows drag and drop file transfers. If that doesn't work, go to the web and download a freeware FTP client that supports the passive transfers. Let me know if that helps.
Atrivis