Going to http://fed-up.comicgenesis.com/
returns a "forbidden" message, so there's no index.html page on there yet. Which is odd because the server will generally generate one until you upload something (the default being either the original comic sample that was submitted on sign up or a flat, black screen).
The dash is fairly rare in CG account names, so that one might be what is causing you to get stuffed around.
Note that SiteAdmin is borked and won't let new users in (registered after May 2009). Don't bother spending the energy trying to log into SiteAdmin, you'll just make yourself angry.
Here are a couple of different options you can feed into CG's built-in WebFTP client:
These three are different ways of encoding a dash (minus sign), which may help (or might not). Give them a try and see if you can log into WebFTP that way.
If none of those three work, you'll probably need to use a third-party FTP program. I use and recommend Filezilla, it is stable, available for most platforms and known to work with CG.