ok there is a very handy feature if you right click at a file in the FTP browse called "Copy URL"
This function copy the ip address + the filename (if the file would be in the main window)
Well back to the problem, my FTP upload IP is "ftp.web1000.com" but the site name is "<user>.web1000.com" so the program think the main index file is at "ftp.web1000.com/index.html" when it should be "<user>.web1000.com/index.html"