I am using Powerpoint 2011 on Mac system 10.9.3 (Mavericks). I embedded the audio files (aif), saved it and they work fine. However, if I close the powerpoint file and then re-open it, the embedded audio won't play. I have tried this several times, embedding the files using the insert command and they play perfectly but as soon as I quit the application and re-open it, the audio won't play. This powerpoint presentation is an older one from 2004 created originally from the 2004 version of powerpoint. I opened it in Powerpoint 2011 made some changes and added the sound files. Could this be the problem?