FTP is normally on port 21: not 80.

Try using telnet to do your ftp.  It might help diagnose your problem.  Also trace which ports it is accessing using wireshark http://www.wireshark.org/.  It may be that those ports are blocked.

Have a look at http://www.ntchosting.com/ftp/ftp-port-connection.html for an example of how to use telnet.

Great idea but my problem is not with ftp. I can use frontpage to load 100's of files. The problem lies when I try to publish. I understand from my host that if I ftp the whole site then fP extensions will have to be reinstalled. I created a one-page website, deleted the old from the server, reinstalled frontpage extensions and tried to 'publish'. That is where the error occurs. If it goes quickly, I don't get the error ...sometimes I can publish without incident. If I try to do any publishing where it compares time/date stamps and it takes a little time, it errors out on port 80 for http://....works for ftp but not http. I called my provider and port 80 is not blocked. I called Norton and they uninstalled my firewall/virus software so I could eliminate that problem. I'm getting some sort of false Port 80 block but I have no http problems anywhere else.  I will try your site suggestions...and thank you!

I've only ever uploaded to the site using ftp: I've never used http.  In fact, the only website course I went on the lecturer said that http didn't work and we ought to use ftp.  That was in 2003.  I don't think MS has fixed the problem.