Genealogy.com dropped support for Family Origins about two years ago and you cannot upload your web sites to their server anymore.
You can get some free web space from some ISPs and there are some sites where you can post free genealogical information, I have mine at RootsWeb.com free pages. They put advertisements at the top and bottom of each page. They also have rentable space, as do many other places, where you can upload your information.
You have to use some kind of FTP program to upload the web page from the folder that Family Origins puts it in. FTP = File Transfer Protocol, a means of transferring computer files from one site to another.