Welcome to the forum, bozenb!
1st things 1st:
More info would sure be helpful.
What brand is your PC?
What brand of burner is in your PC?
What brand of CDRW ?
Have you had problems like this before?
Can you burn other types of files to disc (data, etc...)
A different CDRW or try a CD-R.
A different burning program.
(process of elimination)