Pioneer dvd-rw dvr-
have you connected the 4 pin molex plug from the computer mainboard to the drive ?
is the IDE Cable correctly fitted ?
did you set the jumper connector on the rear of the drive to Master Or Slave ? if you are sharing the cable with a hard-drive, and the hard-drive jumper is set to slave, then the dvd will have to be set As Master ( otherwise they conflict ) or only 1 device will be recognised.
This should Solve your problem here.
Mike @ Compurepair.