2007 BECKER AUDIT -How to update chapter 3 and 4 from A to B.

I have BECKER 2007 and trying to update AUDIT chapter 3 and 4 from A to B.


I put A3-B CD in and followed the update procedure, but always got the error message: “Can’t find the files on the CD please make sure the CD is in the drive.” But the CD is there...any answers from computer savvys?


Anyone knows how to solve this? Thank you very much.