I finally got my new Guest Windows XP Pro OS up and running. But when I tried to install my first Windows based software, it did not work. This is an older program that uses 3 1/2 install floppies but I have a USB connector to an external A drive and I can install it on my regular Windows PC but cannot on Parallels guest OS. The Mac OSX system recognizes the USB connection but the Parallels VM does not. Can someone help?