What cd are you trying to copy?
and what model samsung is the writer?
CloneCD 3.0.8.1 just came out today, update to that if you havent already and check the
Supported Writers section of the CloneCD website to make sure your writer is supported.
Also, the only time I've ever had errors like that is when I tried to write to the CD at a speed the blank cd didnt support. Try dropping down to a slower write speed.