try to connect it using another sata cable, once my motherboard wasn't seeing my CD/DVD drive, so I decided to just try it on a different port with a different sata cable, and it worked, and then I went back to the port that I was using before and it also worked, so the conclusion is the sata cable I was using was DOA, because I tried another one but the same model and it worked....try doing this, hope it fixes it...