iBook combo drive question

[david]

I got a Pioneer DVD-R burner to put into my desktop and it now thinks 
it has a stock SuperDrive. I’ve already burned my first DVD using iDVD 
and several data CDs too. Now for the iBook problem: My iBook won’t 
read any of the DVDs I’ve burned. My wife’s iMac can as can my desktops 
at work and the DVD players I’ve tried. The iBook is the only machine 
that seems unable to read them. But! When I popped in two commercial 
DVDs it could read them.

At the moment I don’t have another iBook with combo drive to test. Has 
anyone had similar problems? If anyone has successfully read burned 
DVDs, what media are you using?

thanks
david
=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
Good qualities are easier to destroy than bad ones, and therefore
uniformity is most easily achieved by lowering all standards.
  ~~ Bertrand Russell

David