Disklavier

While using my "Power Tracks" program, about 50 percent of the time,
when I stop a song and then restart it either from the beginning of
the song or from where I stopped it, the Disklavier's Play/Pause
button will start flashing and won't resume the song. The song in the
program will be playing and I can watch the notes played on the
computer but the Disklavier's "Play/Pause" button will be flashing and
the Disklavier will not be playing the song unless I push the
"Play/Pause" button at which point the piano starts again with the
computer. It seems that by pressing  the stop function in the "Power
Tracks" program activates the pause on the Disklavier and then doesn't
release it when I restart the song. Does anyone know why this is
happening? Thanks, Mike