I try to reuse a CD ROM from an old machine. However, the jumper setting in this CD drive is not clearly labelled. The jumpers are only labelled as 0, 1, 2, 3 instead of mater,slave.... When I connected it to the IDE port (2nd master or 1st slave) I can not boot the machine no matter how I set the jumper. The machine can not even initiate the video. I know this CD ROM is in good condition because it worked in another machine when I took it. Can anybody who have experience in use these drives give me some suggestions?