Quicktime export problem: no sound

[dwirtschafter]

I am trying to copy a home made QT movie using export as function (it is not a protected movie; I can make copies that will run on MACs, but not PCs with QT). The video picture copies and successfully back on a pc with QT, but there is no sound. I have tried various combinations of "default settings" and "recent settings" without success. Ideas please?

 

[iMeowbot]

in Quicktime Player, check the information in Window->Show Movie info. What does the Format line say?

Also, if you could, how about Window->Show Movie Properties? What are the formats listed there in the top section of the window?