Play button doesn't play.

Thanks, Dan.

When the play button isn't working, sometimes it seems to help to click >> and then try the play button again.  Or maybe click >> and <<. Also, I think that the problem may have something to do with the designation of a 'work area.'  It almost looks like there's a mini work area lasting a fractional second at the beginning of the file and the play head does not want to advance past it.  When I click play, the scene does play, perhaps, but only for a fraction of a second.  I mention that possibility because I have been able to make the playback problem disappear by clicking on some option about the work area.  Also, in the midst of the playback problem, I tried exporting the video for the entire 3-minute scene, and the duration of the export was only about .04 seconds.  So both playback and export seem to be hung up on the very beginning of the scene file.