Missing Music.

Not sure if this is the right section...If not apologies...I have a Powerpoint file presentation "This place called Earth" with a song running with it....
Can't get the music to work now...Any ideas please folks.
know it's a pps........ Powerpoint file which used to work ok. I still have PP installed so I am at a loss as to the prob...
I have been listening to Mp3's CD music and DVD's on my computer with no problems
The copy I posted and another copy I have on a Cd used to work as I said only neither one will now...
XP Pro SP2......PP2003
I have Macro Flash...
Any suggestions please
Regards
peppercorn
Ps
The Winrar file will not upload to MG for some reason 2.025 kb in size
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