Mac Command Line FTP Client

[#1]

Has anyone ever managed to connect, and upload, files to the PlusNet FTP server (ftp.plus.net) using the command line 'ftp' program on Mac OS X (10.5)?
I was trying last night and it was failing, but my linux box managed it fine (thus ruling out the FTP server).
I don't really use FTP enough to justify getting a GUI program, so I was just wondering if anyone had ever managed it...
(I debated whether to put this here or everything internet... and here won in the end)

[#2]

FireFTP is an excellent FTP for FireFox if you want a GUI.
Works on Linux and presumably it will also work on a Mac.

[#3]

Yeah, I do have that installed, but it's not working with the Beta version just now. I'd rather just work out why the command line one doesn't work.