Back when I used CDRW media, I too found that it was prone to errors.  I also found that anti-virus software will corrupt the data if running in the background while writing to CDRW.  And there are other programs/Apps that interfere with CDRW media as well.

  Since I have upgraded to DVD media, I have never got an error on any of my DVDRW's, even with the anti-virus running in the background.

  One of the biggest factors with CDRW media is the type of media your using.  Some brands/colors of media will work fine with certain brands of CD writers and fail on others.  The trick is to find the brand of CDRW media that works best for your particular CD writer.  Most all CD writers have a list of media that is suggested for use.

  And don't forget, match the speed of the media to the writer.  Don't use 40X media on a  32X CD writer.  Shut down un-needed background task, especially anti-virus.  And never ever have more than 1 CD authoring software installed on your computer at a time.  INCD and Roxio, or any other brand of writing software installed on the same machine will make lots of trouble.

  There are many tricks and tweaks for CDRW drives that can be found all over the internet....