That problem can be due to 3 reasons:

1. The quality of the discs are beyond readable.
2. The disc manufacture might have used encryption methods.
3. The disc drive is not reading the discs in the needed fashion to perform the extraction.
   

What you would want to do is try other discs from other manufactures. If those work then it is likely that the problem is #2 from the list above.

Another thing to note is that your computer has to be able to read the disc before MCG Manager can. To see whether it has, go to “My computer” and look at the drive that has the disc in it. It should state “Audio CD” and if you go into the drive itself, by right-clicking on the disc drive and selecting Explore, you should normally see the tracks listed. If you do not see the tracks, then your computer cannot read the disc and therefore neither will the MCG Manager program.