try some free data recovery tools you may have a damaged mbr or partion table that not letting windows see the hard drive.
if the recovery tools cant see your drive it may have bricked itself.
Thanks for your quick reply smorizio. I tried Testdisk and the following message appears when fully analyzing the disk:http://i47.tinypic.com/30aqgib.jpg
Not too familiar with HD Jumer Settings and BIOS detection. Any idea what I should do next? Testdisk gives me the option to now Rebuild the Boot Sector or repair MFT.