Subtitles Yes, subtitles No....

[falconry]

I've copied a DVD with DVDShrink on a DVD+RW and it played well on both my stand alone dvd-player and the stand alone dvd-player of a friend WITH subtitles.
However, the Home Cinema Set (Pioneer) of my daughter didn't display the subtitles as where the specifications of the set say it's compatible with DVD+/- R/RW! The movie itself wasn't a problem, just NO subtitles.
I again copied the movie from my harddisk to a -RW and again NO subtitles on my daughter's Home Cinema Set.
Someone on a dutch forum suggested to use a DVD-R. I'll try this another time....
Do someone know what's the problem?

[WH]

Did you turn on subtitles using the remote?

[falconry]

Yes, that's not the problem.
Thanks for your reply.....