the UJ drive is made by Panasonic so any Panasonic DVD RAM driver
should work -- but DVD-RAM is built into Windows in any case so it's strange that it's not being picked up. The last time the DVD-RAM driver by Panasonic was updated was way back in Windows 98 / Windows 2000 days.
Try "Uninstalling" and deleteing the DVD driver and after a reboot let Windows update find a new one.
In the device manager there is an option to delete the driver when uninstalling.