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Sorry to hear about your situation with this book; we'd fix it of we could, but O'Reilly Media is not the publisher of the Classroom in a Book series.
O'Reilly's *Flash CS4: The Missing Manual* will be released in a couple of weeks: http://oreilly.com/catalog/9780596522...
You'll need to contact Peachpit Press (which publishes the books under the Adobe Press imprint name).
Let's try this:
1.) You should contact the store you bought the book from immediately, and let them know. They may want the bad book back (and of course, they'll replace it with a proper book) so that they can investigate how the defect happened (factory error? shoplifting? other?).
2.) Also, contact Peachpit about the issue here: (it's a long, dynamic address, so I've used an URL shortener to make it easier to get there)
This should do the trick; good luck and let us know how your Flash learning comes along.
Executive Editor, O'Reilly Media, Inc