Insert Audio/Video Path - not working

[ddinisco]

I am simply trying to insert an mp3 file into a container field using a script - go to field, followed by insert audio/video. The error I receive is 'the file could not be found.' I have tried using both a variable and the full path to define the file (two paths listed below). It does work fine when I do this manually using the menu options. What am I doing wrong?

moviemac:/Users/david/Desktop/MusicRapTemp/thinking.mp3

moviemac:/Volumes/SDD/Users/david/Desktop/MusicRapTemp/thinking.mp3

These are absolutely the correct path of the file. Just FYI I can not get this to work with the Insert File option either. 

FMP16

Thanks
David

Edited October 25, 2017 by Lee Smith
changed font and size