HP DV9700 won't detect DVD Drive or Hard drive anymore

My laptop won't detect my second Internal 250G hard drive or my dvd/cd drive.After deleting the upper filters, because it stopped working before, the dvd/cd drive worked perfectly again ,but now it can't be detected as well as my second hard drive. I had the hard drive removed and checked and everything is still on it and it works fine.
Neither show up in My Computer or Device Manager any more.
OS Vista home premium. Hard drive WD Internal 250G
Why can't these 2 important drives be detected any more????

Please help!!!!