I'm trying to reinstall Vista OS on Dell XPS M1530. I have all the disks. I printed the reinstallation instructions from Dell; I've wiped the partitions, designated new partitions. When inserting the Vista 32 bit OS disk, the screen says "hit any key to begin...". I do that and nothing seems to happen. The optical drive stops; only the fan remains running. I leave it alone for a couple hours but nothing seems to happen. What am I missing?