It has to be asked: Did you connect the power connector to the drive? You will often see external HDDs that can run off of USB power alone, but you can't rely on that with these kinds of solutions.
I recently purchased a adapter converter cable from amazon,
http://www.amazon.com/Drive-Adapter-Converter-Optical-External/dp/B000YJBL78/ref=cm_cr_pr_product_top , and this device with another hard drive being connected is not being recognized on my laptop using Windows 7. Does anyone know of any solutions or areas where I could look to find solutions?