I'll assume that the Sound Choice you are having trouble with have a little note on the bottom of the disc telling that this disc won't play in your computer, and may even mention that it is protected with Media Cloq.
http://www.mtu.com/vbulletin/showthr...&threadid=1016
Here is the link to the thread that is five pages long with everything you ever wanted to know about backing up Sound Choice discs. Read it through, some people are having much success and others are not, but you will see that you are not the only person with that problem.
Good Luck
Jim