I thought you said your ISP blocked port 21? So I was right after all...
Anyway, you're still screwing up:
C:\> ftp 65.49.122.27 Connected to 65.49.122.27. 220 Microsoft FTP Service User
(65.49.122.27none)): ftp 331 Anonymous access allowed, send identity (e-mail name) as password.
Password: 230 Anonymous user logged in.
ftp> ls
200 PORT command successful. 150 Opening ASCII mode data connection for file list. 226
Transfer complete.
ftp> bye
221