The ftp server may be down at the moment, bizhat.com does not allow files to be uploaded over 2MB.
Keep all your files under 2 MB and the files will show.

Also try copy from your windows explorer copy the files you want to upload by highlight them and then right click copy then go to FTP Page, and Right clickon white part and paste.

Also Iwould recomend using SmartFTP.
I think they do allow Frontpage Extensions, but I dunno I don't remember ever using Frontpage on bizhat.com