Video clips in PDF created from FM12 file won't play in Reader 11 or Acrobat 9

I have inserted several short video clips into a small manual created with FrameMaker 12 (all mp4 format). Book file is saved as a PDF. When I open the PDF in Acrobat 9 or Reader 11 and click on the icon for any of the videos, I see only a black box. When I open the same PDF in Reader 10, the clips all play just fine. What do I need to do to make these videos play in current versions of Reader. NOTE: I have Reader 10, Acrobat 9 Pro Extended, and FrameMaker 12 running on my computer.