Issue with Keynote export to Quicktime - audio lost after copying file

[Kyzr]

I have a Keynote file with embedded audio that I've exported to Quicktime. It plays flawlessly from my hard drive. If I copy the file to a flash drive or burn it to a disc and then try to play it from those locations, the audio is lost.

It's urgent because I need to use the Quicktime file with audio tonight! Help?

Thanks in advance!