do post captures as Kenshin wisely suggested. It's not easy to debug without seeing.
Personally I'm seeing errors like this.
In fact, scanning works on none of my drives with CD-DVD Speed 4.0.
PS It's not the disc. I've tried several and they are all very good burns and fully readable in all my drives. CD-DVD Speed 4.0 just doesn't work for me, I don't know why.