|Maybe try this: go out to command prompt (cmd.exe), type FTP [enter]|
Then you maybe get prompt: FTP>
(leave off the :21, that is generally assumed as the ftp port, which may be what's fouling your browser as well).
If you got this far no error, it's asking for username or (none). Try [ENTER]
(ie: none). If that fails try "guest".
Then when it asks for pass, try just [ENTER] key. (If "guest" is set up, it almost by definition will not have a password.).
If you got this far, then you're set to go, other than navigating to the correct directory.
I would first try removing the :21 from your browser-bar.
@wanderer: I wondered about that, but not long enough for the bulb to light up! ;-)