A common cause for error is an insufficient power supply.
To provide sufficient power supply, please make sure that both large ends of the USB Y-cable are connected to the USB ports on your computer. Plug the power cord if you are using a laptop.
Please avoid using USB hubs, extension cables or other USB devices, as they often will not supply sufficient power to a portable DVD writer.
Please also try on other computers, cables or discs to see if your issue is related to these devices.