Clue one..... Nero 6 is awfully OLD to be used with 2010 OS's or software.
If you want to keep using Nero, I'd certainly update it to version 8 or better. I think version 10 is out now.
I paid $100 for my first copy of Nero, but I think it's a lot cheaper today.
There are even some FREE CD/DVD burning programs out there.
I've been using "ImgBurn" for all my ISO creation and burning. It's very fast, efficient and of course.....it's FREE.
Good Luck,
Doc
