I just added an ATA hard drive to my new Windows Vista installation. It shows up in device manager and says it's working fine, but under the My Computer link, it doesn't show up as mapped to a letter. I currently have a SATA drive with two partitions (C: and D:), a DVD drive that's mapped to E:, and the first ATA drive that's mapped to F:. Any thoughts on what I need to do to get this to show up? Thanks.