Sound won't play

[mrjoey98]

I have OnShutdown configured to play a sound at shutdown. Only problem is, the sound doesn't play, particularly if I use a password on my account. It seems that disabling my password will allow the sound to play. Is there some other way for me to have a sound play at shutdown using OnShutdown? Or is just not having a password the solution?
This is the PowerShell command I'm using: powershell.exe -c (New-Object Media.SoundPlayer ‘C:\Media\ShutdownSound.wav’).PlaySync();
I later modified the command to point to wizmo.exe (in my Windows folder) to play the sound, but that also becomes silenced if I have a password on my account.