I've installed gnome, nautilus, and gvfs but I still cant get the virtual file systems to work. For example if I type a name like sftp://user@server_name in the location bar I get an error that it cant find it in the local filesystem.

If I select "connect to server" from the nautilus file menu and provide an sftp URI I get "cannot connect to server. you must enter a name for the server".

What do I need to do to get vfs working?