[X-SW] Power Point Presentations - Audio

[tucker ian]

I put together a slide show with accompanying midi music using Power  
Point from the Microsoft Office 2004 package.   It plays back fine at  
my end, but when I have emailed it to both  Mac and Windows' users  
there is no audio.    In the case of the other Mac user,  she  
actually emailed the file  back  to me and the audio was fine when I  
opened it.

I have on-forwarded  other   Power Point presentations   received by  
me( and containing audio) and the sound has been audible at the other  
end.

Has anyone got any suggestions as to how I can ensure the audio in my  
own presentations is available to email recipients please?

Ian Tucker