Hi, my NERO 7 won't allow me to use the Simulation feature when burning a Data DVD.

Hi there, I've been using my nero 7 for so long without any problems, but suddenly out of nowhere when I go to burn Data DVD's I'm not given the option of three burn speeds anymore, and I can'tuse the Simulation feature anymore...

My burner is a Pioneer DVD-RW DVR-106D [DVD]

Now I can burn fine, but my DVD Player in my XBOX won't read the DATA DVD disks anymore, where as I have a hundred other Disks (same brand of DVD Disks as well) that were burned with the three Speed options and Simulation feature available that always worked perfectly in my player!

Thank you for your help.