cd quality can make a difference here when overburning, and there may be corruption at the end of the disc as well.
(nero 6)
You'll need to enable overburning, go to file > prefrences > expert features, and from here you can enable overburning. As the note says, overburning requires disc at once, not track at once.
After dragging files into window, go to file > compilation properties
Take a look at total data to be written. If it is very close to 700MB then you should be okay, with my burner/cds (plextor 2410a+taiyo yudens) I had a fixation error when burning a 725mb cd.