Hi, I just bought a new emachines computer that came with a dvd/cd rewrite disc drive. However, I installed a second disc drive when I got home. the problem is that I can only get one of them to work at a time. If they are both pluged in only the new one works. If I unplug the new one then the factory one works. I called the company, they said something about going into the Bios to fix the problem, but I couldn't make any progress. Any advice would be great!