Sound object does not play in a slide show due to Sound Recorder open.
Cause:
'Sound Recorder' is open while the object is pasted into the presentation.
Solution:
Close the 'Sound Recorder'.
1) Switch to 'Sound Recorder'. (The Sound Recorder dialog box appears.)
2) Select the 'File' menu and select 'Exit', to close 'Sound Recorder'.
3) Insert the sound object again.
4) Run the slide show again. (The sound object now plays.)