BTC DVD IDE1008 CPU Usage

This is my first visit to this forum (or any forum come to think of it!!). I need help please. I am trying to use the latest version of nero on an XP Professional platform. I am using a (Emprex) BTC DVD IDE1008 and have no problems backing up my hard drive but when I use Nero for burning DVD’s, I seem to get problems with my CPU usage (100%) and the whole thing slows to a virtual stand still. This also happens when I try to create and edit within Nero. I have checked for advice on the forums but nothing seems to work. DMA is enabled, and I have uninstalled and re-installed the IDE drives. I also have the latest firmware.

Hope someone can help

Thanks Rich