hello friend, how are you? There are some reasons bcz of which that problem accurs. First of all, I advice you to use nero express software to burn your CD's. Secondly, plz give me some more details like what really happened when problem accurs "is your drive lose power or eject the CD out?" and "what is % of burned data when problem occurs?" etc.....
May be there is some sort of virus....
Do take care of you and others and be happy...
D Wahab