adding sound file to pps

[Sarah]

hi,

I have added a sound file to my pps, which plays through
the presentation for four slides. When I open it on my
computer the sound plays, but when I email the pps to
someone the sound does not play. Is there anyway I can
resolve this so that when I email the presentation the
sound plays when the recipient opens it.
I immensely appreciate your giving me the answer & thanks
so much!!!
sarah