Book's included CD does not load...it errors out. I tried it twice.

I downloaded ASP.NET Express from Microsoft...it loaded fine.

I downloaded PPQ example, expanded it, etc.
I got to PPQ example Database, beginning on page 10, and ...
  ** There are two database files.
  ** The one exemplified (PPQ_Data.MDF) has nothing in it!
  ** The other one does have content

What am I doing wrong? ThanX for your help!