I've never heard of this happening, but perhaps after
exporting the sounds, try moving the .fho's and/or .mp3's (or whatever file they export as) to your
my_objects, and have your members do the same.
If that doesn't work, maybe they just aren't exporting correctly. Try COPYING the meshes
to your exports folder (the actual .mesh and everything).
This is all I can think of that might fix the solution. Worth a try!