700 MB problems

[buppu]

I'm having problems when I'm trying to fill a C.D. to the brim. When i fill a cd with files, and go over 650 MB, the cd becomes unreadable.. Also, trying to make a copy of a CD that is almost completely filled (699-700 MB) causes the same problem.
I use a HP+8100 writer and tried a couple of programs like Easycd and Clone cd, but they all give the same problem.
At this moment I'm downloading Nero, to see if that program can fix the problem.
All help is welcome, thanks.