connecting to Ip address

I've been using my FTP client to upload files to addresses like "" without any problems, but when I try to use IP addresses like "" in the address line I can't connect. Any suggestions?

Wow, did you even read my question? I think I was fairly clear that I've been using the smartFTP to upload things to host names, AND CONNECTING WITHOUT PROBLEMS, but I can't connect when using an IP address. Basically, I'm asking if there's a different procedure for connecting to IP addresses. That tutorial, which I watched 3 times before asking the question, makes no distiction between connecting to a host name and connecting to an IP address.