I could even get there through browser FTP connections, but not my FTP client (which, note, would connect to anything else, just not his server). in the end, the best I can figure is that it doesn't seem to like the DNS redirect that gets to his server. A little more looking reminds me that this is, to put it mildly, antiquated software (as in it's version 5, and Ipswitch just released version 9). Since they no longer offer a free version, and I'm not paying $35 for an FTP client, it was time to kiss it goodbye.
Luckily, just this morning, I was turned on to FileZilla, which works absolutely ducky. Time to move on...