HI, I made a usb cable adaptor to rca plugs for my cam corder Sony small cartridge tape type, and I followed the instructions using the white wire to audio and the green wire to the video rca plug from my cad cam camera, well it doesn't see the camera ,I tried to reverse the plugs and nothing, I didn't use the red and black wires on the usb cable because I don't need to power anything and my rca plugs from the camera are only one center wire and a ground shield , what's wrong, do I need a program or driver for it to work,I noticed Easy cap makes a similar adaptor , however it comes with a cd disk. please let me know if there is any download to make my cad cam work? thank you